阅读说明：本技术 基于变频技术及辅助油槽的高位油箱滤油系统及工作方法 (High-level oil tank oil filtering system based on frequency conversion technology and auxiliary oil tank and working method ) 是由 韩万龙 姚明宇 李光明 顾正萌 张纯 张旭伟 吴家荣 杨玉 于 2021-02-07 设计创作，主要内容包括：本发明公开了一种基于变频技术及辅助油槽的高位油箱滤油系统及工作方法,该系统包括高位油箱、辅助油槽、变频滤油机、溢油管路、补油管路、进油管路、辅助油槽排污管路、粗滤过滤器、精滤过滤器、变频油泵、变频器、取样管路以及若干配对法兰和关断阀,本发明采用基于变频技术及辅助油槽技术为高位油箱滤油系统增加了可调冲洗流速的自由度,通过与高位油箱的进油管路、补油管路和溢油管路相连,采用无补油管路的高速滤油循环、无进油管路的高速滤油循环和包含补油管路和进油管路的滤油循环,增加了滤油流速和滤油效率,该方法对进油管路、补油管路和溢油管路的杂质冲洗过滤的更为彻底,能有效防止高位油箱管路内的杂质进入叶轮机械的轴承系统。(The invention discloses a high-level oil tank oil filtering system and a working method based on a frequency conversion technology and an auxiliary oil groove, the system comprises a high-level oil tank, the auxiliary oil groove, a frequency conversion oil filter, an oil overflow pipeline, an oil supplementing pipeline, an oil inlet pipeline, an auxiliary oil groove sewage discharge pipeline, a rough filtering filter, a fine filtering filter, a frequency conversion oil pump, a frequency converter, a sampling pipeline, a plurality of mating flanges and shut-off valves, the invention adopts the frequency conversion technology and the auxiliary oil groove technology to increase the freedom degree of adjustable flushing flow rate for the high-level oil tank oil filtering system, and increases the oil filtering flow rate and the oil filtering efficiency by connecting with the oil inlet pipeline, the oil supplementing pipeline and the oil overflow pipeline of the high-level oil tank and adopting high-speed oil filtering circulation without the oil supplementing pipeline, high-speed oil filtering circulation without the oil inlet pipeline and oil filtering circulation containing the oil supplementing pipeline and the oil inlet pipeline, and the method is more thorough in flushing and filtering of impurities in the oil inlet pipeline, the oil, impurities in the high-level oil tank pipeline can be effectively prevented from entering a bearing system of the impeller machine.)

1. High-order oil tank oil strain system based on frequency conversion technique and supplementary oil groove, its characterized in that: comprises a high-level oil tank (1), an auxiliary oil tank (2), a frequency conversion oil filter (3), an oil overflow pipeline (4), an oil supplementing pipeline (5), an oil inlet pipeline (6), an auxiliary oil tank sewage discharge pipeline (7), a rough filtration filter (8), a fine filtration filter (9), a frequency conversion oil pump (10), a frequency converter (11), a sampling pipeline (12), a plurality of mating flanges (13) and a plurality of shut-off valves (14), wherein an oil inlet interface, an oil supplementing port interface and an oil overflow port interface which are arranged on the high-level oil tank (1) are respectively connected with one end of the oil inlet pipeline (6), one end of a main trunk circuit of the oil supplementing pipeline (5) and one end of the oil overflow pipeline (4), the other end of the oil overflow pipeline (4) is connected with an outlet pipeline of the frequency conversion oil pump (10) on the frequency conversion oil filter (3) through the pair of mating flanges (13), the other end of the oil inlet pipeline (6) is connected with the oil inlet pipe interface of the auxiliary oil, the other end of the main pipeline of the oil supplementing pipeline (5) is connected with an outlet pipeline of an oil supplementing pipe joint of the auxiliary oil tank (2) through a pair of mating flanges (13), one end of a sampling pipeline (12) is communicated with a three-way joint of the main pipeline of the oil supplementing pipeline (5), an inlet pipeline of a coarse filter (8) is connected with an oil overflow pipe joint of the auxiliary oil tank (2) through a pair of mating flanges (13), an outlet of the coarse filter (8) is directly connected with an inlet of a fine filter (9) through an internal pipeline of a variable frequency oil filter (3), an outlet of the fine filter (9) is directly connected with an inlet of a variable frequency oil pump (10) through an internal pipeline of the variable frequency oil filter (3), a shut-off valve (14) is respectively arranged in the middle of a pipeline between the coarse filter (8) and the fine filter (9) and in the middle of a pipeline between the fine filter (9) and the variable frequency oil pump (10), the middle part of a sampling pipeline (12) is provided with a shut-off valve (14), the middle part of a pipeline on the inner side of an oil supplementing pipe interface flange of an auxiliary oil tank (2), the middle part of a pipeline on the inner side of an oil inlet pipe interface flange and the middle part of a pipeline on the inner side of an oil overflow pipe interface flange are respectively provided with the shut-off valve (14), the middle part of a pipeline on the inner side of an outlet flange of a variable frequency oil pump (10) of a variable frequency oil filter (3) and the middle part of a pipeline on the inner side of an inlet flange of a coarse filter (8) are respectively provided with the shut-off valve (14), a blowdown pipeline (7) of the auxiliary oil tank is provided with the shut-off valve (14), and the.

2. The high-level oil tank oil filtering system based on the frequency conversion technology and the auxiliary oil tank as claimed in claim 1, wherein: the frequency converter (11) controls the oil supply lift of the lubricating oil by controlling the rotating speed of the frequency conversion oil pump (10), and the oil supply lift of the frequency conversion oil pump (10) regulated by the frequency converter (11) is greater than the sum of the lengths of each section of vertical trend pipelines of the oil overflow pipeline (4) in the operation process.

3. The high-level oil tank oil filtering system based on the frequency conversion technology and the auxiliary oil tank as claimed in claim 1, wherein: the oil overflow pipeline (4), the oil supplement pipeline (5) and the oil inlet pipeline (6) are all provided with a vertical pipeline and a horizontal pipeline.

4. The high-level oil tank oil filtering system based on the frequency conversion technology and the auxiliary oil tank as claimed in claim 1, wherein: the sampling pipeline (12) is a horizontal pipeline, and the distance between the sampling pipeline (12) and the joint position of the oil supplementing pipeline (5) is less than or equal to 1 m from a flange plate of the oil supplementing pipeline (5).

5. The high-level oil tank oil filtering system based on the frequency conversion technology and the auxiliary oil tank as claimed in claim 1, wherein: the rated volume of the auxiliary oil groove (2) is more than or equal to 2 times of the sum of the rated volume of the high-level oil tank (1) and the volumes of the oil overflow pipeline (4), the oil supplement pipeline (5) and the oil inlet pipeline (6).

6. The high-level oil tank oil filtering system based on the frequency conversion technology and the auxiliary oil tank as claimed in claim 1, wherein: the rough filtering filter (8), the fine filtering filter (9), the variable frequency oil pump (10) and the frequency converter (11) are fixed on a base of the variable frequency oil filter (3).

7. The working method of the high-level oil tank oil filtering system based on the frequency conversion technology and the auxiliary oil tank is characterized in that: the oil injection stage comprises closing all shut-off valves (14), opening a knob type oil filling cover at the top of the auxiliary oil groove (2), injecting lubricating oil into the auxiliary oil groove (2), the amount of injected lubricating oil is 1.3 to 1.5 times of the volume of the lubricating oil required by the oil filter of the high-level oil tank and the pipeline thereof, a knob type oil filling cover is covered, all shut-off valves except a shut-off valve (14) positioned in the middle of a sampling pipeline (12) and a shut-off valve (14) positioned on a sewage discharge pipeline (7) of an auxiliary oil tank are opened, a frequency converter (11) is opened to start a variable frequency oil pump (10) and adjust the oil supply lift, the lubricating oil is pumped into the high-level oil tank (1) through an oil overflow pipeline (4), the liquid level of the high-level oil tank (1) is 70 percent of the rated volume, the variable frequency oil pump (10) is closed after the oil injection stage is completed, and all; the oil filtering stage is divided into three steps, wherein the first step is to open all shut-off valves except a shut-off valve (14) positioned in the middle of a sampling pipeline (12), a shut-off valve (14) positioned on a blowdown pipeline (7) of an auxiliary oil tank and the shut-off valve (14) positioned in the middle of a pipeline inside an oil supplementing pipe joint flange of the auxiliary oil tank (2), start a variable frequency oil pump (10), enable lubricating oil to sequentially pass through an oil inlet pipeline (6), the auxiliary oil tank (2), a coarse filter (8), a fine filter (9) and the variable frequency oil pump (10) from a high-level oil tank (1) and then return to the high-level oil tank (1) again to realize high-speed oil filtering circulation of a non-oil supplementing pipeline (5), and simultaneously close the variable frequency oil pump (10) and all shut-off valves (14) when the lubricating oil completes multiple high-speed oil filtering circulation of the non-supplementing pipeline (5), enter the second step of the oil filtering stage, and then open the shut-off valve (, A shut-off valve (14) positioned on a sewage discharge pipeline (7) of an auxiliary oil tank and all shut-off valves except the shut-off valve (14) positioned in the middle of a pipeline at the inner side of an oil inlet pipe joint flange of the auxiliary oil tank (2) are started, a variable frequency oil pump (10) is started, lubricating oil sequentially passes through an oil supplementing pipeline (5), the auxiliary oil tank (2), a coarse filter (8), a fine filter (9) and the variable frequency oil pump (10) from a high-level oil tank (1) and then returns to the high-level oil tank (1) again, high-speed oil filtering circulation without an oil inlet pipeline (6) is realized, after the lubricating oil completes multiple high-speed oil filtering circulation without the oil inlet pipeline (6), the third step of an oil filtering stage is carried out, the shut-off valve (14) positioned in the middle of the pipeline at the oil inlet pipe joint flange of the auxiliary oil tank (2) is opened, the lubricating oil is divided into two, the oil is returned to the high-level oil tank (1) again after passing through an auxiliary oil tank (2), a rough filtering filter (8), a fine filtering filter (9) and a variable frequency oil pump (10) in sequence, oil filtering circulation including an oil supplementing pipeline (5) and an oil inlet pipeline (6) is completed for many times, an oil filtering stage is completed, a frequency converter (11) and the variable frequency oil pump (10) are closed, and all shut-off valves (14) are closed at the same time; in the sampling stage, a shut-off valve (14) positioned in the middle of a sampling pipeline (12) is slowly opened, 5 to 10 liters of lubricating oil is discharged from the outlet of the sampling pipeline (12) to rinse the sampling pipeline (12), a small amount of lubricating oil is collected from the lubricating oil in the flowing state to rinse a cleaned sampling bottle, the lubricating oil in the sampling bottle is poured out, the rinsed sampling bottle is used for collecting 1.5 times of the volume of the lubricating oil required by inspection from the lubricating oil in the flowing state, the bottle cover of the sampling bottle is covered, and the shut-off valve (14) on the sampling pipeline (12) is closed to finish sampling; and in the oil return stage, a shut-off valve (14) in the middle of the pipeline on the inner side of the oil supplementing pipe interface flange of the auxiliary oil groove (2) and a shut-off valve (14) in the middle of the pipeline on the inner side of the oil inlet pipe interface flange are respectively opened, so that the lubricating oil in the high-level oil tank (1), the oil supplementing pipeline (5) and the oil inlet pipeline (6) completely flows back to the auxiliary oil groove (2).

Technical Field

The invention relates to the technical field of oil filtering of impeller machinery lubricating oil systems, in particular to a high-level oil tank oil filtering system based on a frequency conversion technology and an auxiliary oil tank and a working method.

Background

Among the auxiliary systems of the turbomachinery, the lubricating oil system is one of the most important auxiliary systems, and the quality of the lubricating oil is directly related to the operational safety and the service life of the turbomachinery equipment. The prior art can realize that the oil filtering is carried out on the lubricating oil system except the high-level oil tank pipeline in the impeller mechanical system, so that the oil quality of the lubricating oil system except the high-level oil tank and the pipeline of the impeller mechanical system meets the use requirement, but the oil filtering can not be carried out on the high-level oil tank and the pipeline of the impeller mechanical system, thereby increasing the risk that the unqualified oil quality and impurities in the high-level oil tank flow into the bearing of the impeller mechanical system to cause the damage of the bearing or the damage of the whole machine when the power failure accident of the impeller mechanical system occurs.

Disclosure of Invention

The invention aims to solve the problems and provide a high-level oil tank oil filtering system and a working method based on a frequency conversion technology and an auxiliary oil tank.

The invention realizes the purpose through the following technical scheme:

a high-level oil tank oil filtering system based on a frequency conversion technology and an auxiliary oil tank comprises a high-level oil tank 1, an auxiliary oil tank 2, a frequency conversion oil filter 3, an oil overflow pipeline 4, an oil supplementing pipeline 5, an oil inlet pipeline 6, an auxiliary oil tank sewage discharge pipeline 7, a rough filtering filter 8, a fine filtering filter 9, a frequency conversion oil pump 10, a frequency converter 11, a sampling pipeline 12, a plurality of mating flanges 13 and a plurality of shut-off valves 14, wherein an oil inlet interface, an oil supplementing interface and an oil overflow interface which are arranged on the high-level oil tank 1 are respectively connected with one end of the oil inlet pipeline 6, one end of a main pipeline of the oil supplementing pipeline 5 and one end of the oil overflow pipeline 4, the other end of the oil overflow pipeline 4 is connected with an outlet pipeline of the frequency conversion oil pump 10 on the frequency conversion oil filter 3 through a pair of mating flanges 13, the other end of the oil inlet pipeline 6 is connected with an oil inlet pipe interface of the auxiliary oil tank 2 through a pair of mating flanges 13, and the other end of the One end of a sampling pipeline 12 is communicated with a three-way interface of a main pipeline of an oil supplementing pipeline 5, an inlet pipeline of a coarse filter 8 is connected with an oil overflowing pipe interface of an auxiliary oil tank 2 through a pair of mating flanges 13, an outlet of the coarse filter 8 is directly connected with an inlet of a fine filter 9 through an internal pipeline of a variable frequency oil filter 3, an outlet of the fine filter 9 is directly connected with an inlet of a variable frequency oil pump 10 through an internal pipeline of the variable frequency oil filter 3, a shutoff valve 14 is respectively arranged in the middle of a pipeline between the coarse filter 8 and the fine filter 9 and in the middle of a pipeline between the fine filter 9 and the variable frequency oil pump 10, a shutoff valve 14 is arranged in the middle of the sampling pipeline 12, a shutoff valve 14 is respectively arranged in the middle of a pipeline inside an oil supplementing pipe interface flange of the auxiliary oil tank 2, in the middle of a pipeline inside an oil inlet pipe interface flange and in the middle of a pipeline inside an oil overflowing, the middle part of a pipeline on the inner side of an outlet flange of a variable-frequency oil pump 10 of the variable-frequency oil filter 3 and the middle part of a pipeline on the inner side of an inlet flange of a rough filter 8 are respectively provided with a shut-off valve 14, a blowdown pipeline 7 of an auxiliary oil tank is provided with the shut-off valve 14, the rough filter 8, a fine filter 9, the variable-frequency oil pump 10 and a frequency converter 11 are fixed on a base of the variable-frequency oil filter 3, and the top of the auxiliary oil tank 2 is provided with an oil filling port and a knob type oil filling.

The frequency converter 11 of the high-level oil tank oil filtering system based on the frequency conversion technology and the auxiliary oil groove realizes the control of the oil supply lift of the lubricating oil by controlling the rotating speed of the frequency conversion oil pump 10, and the oil supply lift of the frequency conversion oil pump 10 regulated by the frequency converter 11 is greater than the sum of the lengths of each section of vertical pipeline of the oil overflow pipeline 4 in the operation process.

The oil overflow pipeline 4, the oil supplement pipeline 5 and the oil inlet pipeline 6 of the high-level oil tank oil filtering system based on the frequency conversion technology and the auxiliary oil groove are all provided with a vertical pipeline and a horizontal pipeline.

The sampling pipeline 12 of the high-level oil tank oil filtering system based on the frequency conversion technology and the auxiliary oil groove is a horizontal pipeline, and the distance between the sampling pipeline 12 and the interface position of the oil supplementing pipeline 5 and the flange plate of the oil supplementing pipeline 5 is less than or equal to 1 meter.

The rated volume of the auxiliary oil tank 2 of the high-level oil tank oil filtering system based on the frequency conversion technology and the auxiliary oil tank is more than or equal to 2 times of the sum of the rated volume of the high-level oil tank 1 and the volumes of the oil overflow pipeline 4, the oil supplementing pipeline 5 and the oil inlet pipeline 6.

The working method of the high-level oil tank oil filtering system based on the frequency conversion technology and the auxiliary oil tank comprises four stages, namely an oil injection stage, an oil filtering stage, a sampling stage and an oil return stage, wherein the oil injection stage comprises the steps of closing all shut-off valves 14, opening a knob type oil filling cover at the top of the auxiliary oil tank 2, injecting lubricating oil into the auxiliary oil tank 2, the amount of the injected lubricating oil is 1.3 to 1.5 times of the volume of the lubricating oil required by the high-level oil tank oil filtering and pipelines thereof, covering the knob type oil filling cover, opening all shut-off valves except the shut-off valve 14 positioned in the middle of the sampling pipeline 12 and the shut-off valve 14 positioned on the auxiliary oil tank sewage discharge pipeline 7, opening a frequency converter 11 to start a frequency conversion oil pump 10, adjusting an oil supply lift to pump the lubricating oil into the high-level oil tank 1 through an oil overflow pipeline 4, enabling the liquid level of the high-level oil tank 1, all shut-off valves 14 are closed simultaneously; the oil filtering stage is divided into three steps, the first step is to open all the shut-off valves except the shut-off valve 14 positioned in the middle of the sampling pipeline 12, the shut-off valve 14 positioned on the auxiliary oil groove blow-off pipeline 7 and the shut-off valve 14 positioned in the middle of the pipeline inside the oil supplementing port flange of the auxiliary oil groove 2, start the variable frequency oil pump 10, the lubricating oil passes through the oil inlet pipeline 6, the auxiliary oil groove 2, the rough filtering filter 8, the fine filtering filter 9 and the variable frequency oil pump 10 from the high-level oil tank 1 in sequence and returns to the high-level oil tank 1 again, so as to realize the high-speed oil filtering circulation of the non-oil-supplementing pipeline 5, when the lubricating oil completes the high-speed oil filtering circulation of the non-oil-supplementing pipeline 5 for a plurality of times, the variable frequency oil pump 10 and all the shut-off valves 14 are closed at the same time, and enter the second step of the oil filtering stage, at the time, all the shut-off valves except the shut-off valve 14 positioned, starting the variable frequency oil pump 10, enabling the lubricating oil to sequentially pass through the oil supplementing pipeline 5, the auxiliary oil tank 2, the rough filtering filter 8, the fine filtering filter 9 and the variable frequency oil pump 10 from the high-level oil tank 1, and then returning to the high-level oil tank 1 again, realizing high-speed oil filtering circulation without an oil inlet pipeline 6, after the lubricating oil completes multiple high-speed oil filtering cycles without an oil inlet pipeline 6, the third step of an oil filtering stage is carried out, a shut-off valve 14 positioned in the middle of a pipeline at the inner side of an oil inlet flange of an auxiliary oil tank 2 is opened, the lubricating oil is divided into two paths from a high-level oil tank 1, respectively passes through an oil supplementing pipeline 5 and the oil inlet pipeline 6 and then is converged, sequentially passes through the auxiliary oil tank 2, a rough filtering filter 8, a fine filtering filter 9 and a variable frequency oil pump 10, and then returns to the high-level oil tank 1 again, the oil filtering cycle containing the oil supplementing pipeline 5 and the oil inlet pipeline 6 for multiple times is completed, the oil filtering stage is completed, a frequency converter 11 and the variable frequency; in the sampling stage, a shut-off valve 14 positioned in the middle of a sampling pipeline 12 is slowly opened, 5 to 10 liters of lubricating oil is discharged from the outlet of the sampling pipeline 12 to rinse the sampling pipeline 12, a small amount of lubricating oil is collected from the flowing lubricating oil to rinse a cleaned sampling bottle, the lubricating oil in the sampling bottle is poured out, the rinsed sampling bottle is used for collecting 1.5 times of the volume of the lubricating oil required by inspection from the flowing lubricating oil, the bottle cover of the sampling bottle is covered, and the shut-off valve 14 on the sampling pipeline 12 is closed to finish sampling; and in the oil return stage, a shut-off valve 14 in the middle of the pipeline on the inner side of the oil supplementing pipe interface flange of the auxiliary oil groove 2 and a shut-off valve 14 in the middle of the pipeline on the inner side of the oil inlet pipe interface flange are respectively opened, so that the lubricating oil in the high-level oil tank 1, the oil supplementing pipeline 5 and the oil inlet pipeline 6 completely flows back to the auxiliary oil groove 2.

The invention has the beneficial effects that:

at present, an oil filtering scheme for a high-level oil tank and a pipeline thereof in an impeller mechanical system is not available. The invention provides a high-level oil tank oil filtering system and a working method based on a frequency conversion technology and an auxiliary oil groove, which have low manufacturing cost and high operability, increase the degree of freedom of flow speed of flushing welding slag and dust for the high-level oil tank oil filtering system by designing a frequency conversion technology and an auxiliary oil groove technology, increase the flow speed of an oil supplementing pipeline and an oil inlet pipeline by connecting the oil inlet pipeline, the oil supplementing pipeline and an oil overflow pipeline of a high-level oil tank and adopting high-speed oil filtering circulation without the oil supplementing pipeline, high-speed oil filtering circulation without the oil inlet pipeline and oil filtering circulation containing the oil supplementing pipeline and the oil inlet pipeline, and ensure that the flow direction in the oil supplementing pipeline is consistent with the flow direction in the oil supplementing process of the high-level oil tank under accident conditions, and the method can more thoroughly flush and filter the welding slag and the dust in the oil inlet pipeline, the oil supplementing pipeline and the oil overflow pipeline, and can effectively prevent the welding slag in the high-level oil tank pipeline from flushing, Dust enters the bearing system of the impeller machine. The invention reserves a representative sampling port, the experimental result obtained by sampling at the position for assay analysis is more reliable, and the lubricating oil in the high-level oil tank, the oil supplementing pipeline and the oil inlet pipeline can be completely returned to the auxiliary oil tank after the sampling is qualified, so that the lubricating oil can be reused, and the waste of the lubricating oil in the whole oil filtering link is reduced to the maximum extent.

Drawings

FIG. 1 is a schematic diagram of a high-level oil tank oil filtering system based on a frequency conversion technology and an auxiliary oil tank.

Detailed Description

The invention will be further described with reference to the accompanying drawings in which:

as shown in fig. 1, the high-level oil tank oil filtering system based on the frequency conversion technology and the auxiliary oil tank comprises a high-level oil tank 1, an auxiliary oil tank 2, a frequency conversion oil filter 3, an oil overflow pipeline 4, an oil supplementing pipeline 5, an oil inlet pipeline 6, an auxiliary oil tank sewage pipeline 7, a rough filtering filter 8, a fine filtering filter 9, a frequency conversion oil pump 10, a frequency converter 11, a sampling pipeline 12, a plurality of mating flanges 13 and a plurality of shut-off valves 14, wherein an oil inlet interface, an oil supplementing interface and an oil overflow interface which are arranged on the high-level oil tank 1 are respectively connected with one end of the oil inlet pipeline 6, one end of a main pipeline of the oil supplementing pipeline 5 and one end of the oil overflow pipeline 4, the other end of the oil overflow pipeline 4 is connected with an outlet pipeline of the frequency conversion oil pump 10 on the frequency conversion oil filter 3 through a pair of mating flanges 13, the other end of the oil inlet pipeline 6 is, the other end of the main pipeline of the oil supplementing pipeline 5 is connected with the outlet pipeline of the oil supplementing pipe joint of the auxiliary oil tank 2 through a pair of mating flanges 13, one end of a sampling pipeline 12 is communicated with the three-way joint of the main pipeline of the oil supplementing pipeline 5, the inlet pipeline of a coarse filter 8 is connected with the oil overflowing pipe joint of the auxiliary oil tank 2 through a pair of mating flanges 13, the outlet of the coarse filter 8 is directly connected with the inlet of a fine filter 9 through the internal pipeline of a variable frequency oil filter 3, the outlet of the fine filter 9 is directly connected with the inlet of a variable frequency oil pump 10 through the internal pipeline of the variable frequency oil filter 3, the middle part of the pipeline between the coarse filter 8 and the fine filter 9 and the middle part of the pipeline between the fine filter 9 and the variable frequency oil pump 10 are respectively provided with a shut-off valve 14, the middle part of the sampling pipeline 12 is provided with a shut-off valve 14, and the middle part of the, The middle part of the pipeline on the inner side of the oil inlet pipe interface flange and the middle part of the pipeline on the inner side of the oil overflow pipe interface flange are respectively provided with a shut-off valve 14, the middle part of the pipeline on the inner side of the outlet flange of the variable frequency oil pump 10 of the variable frequency oil filter 3 and the middle part of the pipeline on the inner side of the inlet flange of the rough filter 8 are respectively provided with a shut-off valve 14, a drain pipeline 7 of the auxiliary oil tank is provided with the shut-off valve 14, and the top of the auxiliary oil tank 2 is provided with an oil.

As a preferred embodiment of the present invention, the frequency converter 11 of the high-level oil tank oil filtering system based on the frequency conversion technology and the auxiliary oil tank controls the oil supply lift of the lubricating oil by controlling the rotation speed of the frequency conversion oil pump 10, and the oil supply lift of the frequency conversion oil pump 10 adjusted by the frequency converter 11 is greater than the sum of the lengths of each section of the vertically-running pipelines of the oil overflow pipeline 4 during the operation process.

As a preferred embodiment of the present invention, the oil overflow pipeline 4, the oil supplement pipeline 5, and the oil inlet pipeline 6 of the high-level oil tank oil filtering system based on the frequency conversion technology and the auxiliary oil tank all have a vertically-oriented pipeline and a horizontally-oriented pipeline.

In a preferred embodiment of the present invention, the sampling pipeline 12 of the high-level oil tank oil filtering system based on the frequency conversion technology and the auxiliary oil tank is a horizontal pipeline, and the distance between the interface position of the sampling pipeline 12 and the interface position of the oil supplementing pipeline 5 and the flange of the oil supplementing pipeline 5 is less than or equal to 1 meter.

In a preferred embodiment of the present invention, the rated capacity of the auxiliary oil tank 2 of the high-level oil tank oil filtering system based on the frequency conversion technology and the auxiliary oil tank is greater than or equal to 2 times of the sum of the rated capacity of the high-level oil tank 1 and the capacities of the oil spill pipeline 4, the oil supplement pipeline 5 and the oil inlet pipeline 6.

In a preferred embodiment of the present invention, the coarse filter 8, the fine filter 9, the variable frequency oil pump 10, and the frequency converter 11 of the high-level oil tank oil filtering system based on the frequency conversion technology and the auxiliary oil tank are fixed on the base of the variable frequency oil filter 3.

The invention relates to a working method of a high-level oil tank oil filtering system based on a frequency conversion technology and an auxiliary oil tank, which comprises four stages, namely an oil injection stage, an oil filtering stage, a sampling stage and an oil return stage, wherein the oil injection stage comprises the steps of closing all shut-off valves 14, opening a knob type oil filling cover at the top of the auxiliary oil tank 2, injecting lubricating oil into the auxiliary oil tank 2, the amount of the injected lubricating oil is 1.3 to 1.5 times of the volume of the lubricating oil required by the high-level oil tank oil filtering and pipelines thereof, covering the knob type oil filling cover, opening all shut-off valves except the shut-off valve 14 positioned in the middle of the sampling pipeline 12 and the shut-off valve 14 positioned on a sewage discharge pipeline 7 of the auxiliary oil tank, opening a frequency converter 11 to start a frequency conversion oil pump 10, adjusting the oil supply lift to pump the lubricating oil into the high-level oil tank 1 through an oil overflow pipeline 4, ensuring that the liquid level of, all shut-off valves 14 are closed simultaneously; the oil filtering stage is divided into three steps, the first step is to open all the shut-off valves except the shut-off valve 14 positioned in the middle of the sampling pipeline 12, the shut-off valve 14 positioned on the auxiliary oil groove blow-off pipeline 7 and the shut-off valve 14 positioned in the middle of the pipeline inside the oil supplementing port flange of the auxiliary oil groove 2, start the variable frequency oil pump 10, the lubricating oil passes through the oil inlet pipeline 6, the auxiliary oil groove 2, the rough filtering filter 8, the fine filtering filter 9 and the variable frequency oil pump 10 from the high-level oil tank 1 in sequence and returns to the high-level oil tank 1 again, so as to realize the high-speed oil filtering cycle of the non-oil supplementing pipeline 5, when the lubricating oil completes 300 times of the high-speed oil filtering cycle of the non-oil supplementing pipeline 5, the variable frequency oil pump 10 and all the shut-off valves 14 are closed at the same time, and enter the second step of the oil filtering stage, at the time, all the shut-off valves except the shut-off valve 14 positioned in the middle of the, starting the variable frequency oil pump 10, enabling the lubricating oil to sequentially pass through the oil supplementing pipeline 5, the auxiliary oil tank 2, the rough filtering filter 8, the fine filtering filter 9 and the variable frequency oil pump 10 from the high-level oil tank 1, and then returning to the high-level oil tank 1 again, realizing high-speed oil filtering circulation without an oil inlet pipeline 6, after the lubricating oil completes 300 times of high-speed oil filtering circulation without an oil inlet pipeline 6, the third step of an oil filtering stage is carried out, a shut-off valve 14 positioned in the middle of a pipeline on the inner side of an oil inlet pipe joint flange of an auxiliary oil tank 2 is opened, the lubricating oil is divided into two paths from a high-level oil tank 1, respectively passes through an oil supplementing pipeline 5 and the oil inlet pipeline 6 and then is converged, sequentially passes through the auxiliary oil tank 2, a rough filtering filter 8, a fine filtering filter 9 and a variable frequency oil pump 10 and then returns to the high-level oil tank 1 again, 300 times of oil filtering circulation containing the oil supplementing pipeline 5 and the oil inlet pipeline 6 are completed, the oil filtering stage is completed, a frequency converter 11 and the variable frequency oil pump; in the sampling stage, a shut-off valve 14 positioned in the middle of a sampling pipeline 12 is slowly opened, 5 to 10 liters of lubricating oil is discharged from the outlet of the sampling pipeline 12 to rinse the sampling pipeline 12, a small amount of lubricating oil is collected from the flowing lubricating oil to rinse a cleaned sampling bottle, the lubricating oil in the sampling bottle is poured out, the rinsed sampling bottle is used for collecting 1.5 times of the volume of the lubricating oil required by inspection from the flowing lubricating oil, the bottle cover of the sampling bottle is covered, and a valve on the sampling pipeline 12 is closed to finish sampling; and in the oil return stage, a shut-off valve 14 in the middle of the pipeline on the inner side of the oil supplementing pipe interface flange of the auxiliary oil groove 2 and a shut-off valve 14 in the middle of the pipeline on the inner side of the oil inlet pipe interface flange are respectively opened, so that the lubricating oil in the high-level oil tank 1, the oil supplementing pipeline 5 and the oil inlet pipeline 6 completely flows back to the auxiliary oil groove 2.