KR102132752B1 - Method of filtering lubricating oil - Google Patents

Abstract

In the lubricating oil filtering method of the present invention, after the lubricating oil flowing through the inlet of the housing is filtered through the filter, the filtering step of discharging to the outside of the housing through the outlet, the impurity accumulation in the filter as the filtering step is repeated Step, the pressure difference between the contaminated part and the clean part of the filter is increased due to the impurities accumulated in the impurity accumulation step, and the pressure difference sensor detects this pressure difference, and the pressure difference detected in the detection step is transmitted to the control unit. , When the pressure difference exceeds the set value by comparing the pressure difference and the set value in the control unit, a backwash command step instructing a command for backwashing the filter with accumulated impurities, the impurity by the backwash command step This accumulated filter includes a backwashing step in which backwashing is performed. Therefore, the present invention has a remarkable effect of filtering the lubricant to remove impurities remaining in the lubricant and preventing the system from bursting.
In addition, the contamination of the lubricating oil also detects the differential pressure generated by the car and automatically backwashes the filter, thereby saving the working time, which has a remarkable effect of high working efficiency.

Description

Method of filtering lubricating oil

The present invention relates to a lubricating oil filtering method for removing metal particles and impurities from residual lubricating oil. In more detail, the lubricating oil is used to filter the lubricating oil as well as to detect the differential pressure generated by the contamination of the lubricating oil and backwash the filter. It relates to a filtering method.

In general, a propulsion engine for obtaining driving force, a power generation engine for obtaining electric power, etc., the piston moves up and down a thousand times in the metal cylinder every minute, and causes friction and wear of the metal due to friction between metals such as cranks or cams. .

Lubricant is supplied to each part of the engine to reduce wear and heat by minimizing friction of the metal.

However, when the engine is used for a long period of time, since fine wear particles are generated due to abrasion of metal inside the engine, the lubricant includes not only the fine wear particles described above, but also many other fine particles, etc., due to these wear particles and impurities. The viscosity of the lubricating oil is changed to reduce the lubricity as well as increase the frictional resistance, thereby causing a problem in which the wear of the device is greatly increased.

To solve this problem, the prior art Republic of Korea Registered Patent Publication, Registration No. 10-1500187'lubricating oil filtering device' is installed on the bottom surface of the lubricant storage tank, the magnetic wear particles contained in the lubricant on the upper and lower surfaces At least one adsorption plate having a magnetism to be adsorbed, and spaced apart along the bottom surface; A plurality of fixing grips for fixing the suction plate to the bottom surface of the lubricant storage tank, respectively; It is composed of; and a plurality of support pads spaced apart from the lower surface of the lubricating oil storage tank and the lower surface of the adsorption plate to be spaced apart so as to support a plurality of portions of the lower surface of the adsorption plate, respectively. The adsorption plate is made of a plate-shaped square or rectangular magnet, and the fixing grips are respectively installed in pairs on each corner of the adsorption plate, but bent to one side so as to press and fix both sides of the upper surface corners of the adsorption plate, respectively. Described is a lubricating oil filtering device characterized in that the fixing head is installed on the lower surface to have a pressure head installed at the upper end, and the lower end is bent to the other side and coupled to the bottom surface of the lubricating oil storage tank.

In addition, as another prior art, the Republic of Korea Registered Patent Publication, Registration No. 10-0691826'Young Electronics Magnetic Filter' includes a matrix for adsorbing impurities in the fluid passing between the inlet and outlet pipes formed at both ends. In the electromagnet magnetic filter using a permanent magnet and a lead cable that is connected to the filtration basic body and an electric coil to supply electric power, comprising: an electric coil wound around the filtration basic body; A first iron core of a ferromagnetic material having one surface in contact with the outer circumferential surface of the filtration basic body; Permanent consisting of a first permanent magnet and a second permanent magnet opposite to each other on the other side of the first iron core, the polarities facing each other on the basis of the electric coil, which are in contact with one surface of the first iron core and are spaced apart from the electric coil. A magnet; A second iron core of a ferromagnetic material disposed in contact with the other surface of the permanent magnet; An electromagnet magnetic filter is described, which is characterized by including a medium of a ferromagnetic material, which has one end in contact with the outer surface of the first iron core.

However, when filtering the lubricating oil using the conventional device as described above, it is necessary to remove and replace it to remove the metal particles collected in the magnet, so the removal operation is cumbersome and the operation of the system during that time. Since it had to be stopped, there was a problem in that the efficiency of work was poor, such as the inability to continuously operate the equipment.

Republic of Korea Registered Patent Publication, Registration No. 10-1500187 Republic of Korea Registered Patent Publication, Registration No. 10-0691826

The present invention has been devised to solve the above problems, and the present invention not only removes metal particles and impurity particles remaining in the lubricating oil, but also detects a differential pressure generated by the contamination of the lubricating oil, and filters the lubricating oil to filter backwash. Is to provide a method.

In the lubricating oil filtering method of the present invention, after the lubricating oil flowing through the inlet of the housing is filtered through the filter, the filtering step of discharging to the outside of the housing through the outlet, the impurity accumulation in the filter as the filtering step is repeated Step, the pressure difference between the contaminated part and the clean part of the filter is increased due to the impurities accumulated in the impurity accumulation step, and the pressure difference sensor detects this pressure difference, and the pressure difference detected in the detection step is transmitted to the control unit. , When the pressure difference exceeds the set value by comparing the pressure difference and the set value in the control unit, a backwash command step instructing a command for backwashing the filter with accumulated impurities, the impurity by the backwash command step Characterized in that the accumulated filter includes a backwashing step in which backwashing is performed.

Therefore, the present invention has a remarkable effect of preventing the system from rupturing by filtering the lubricant to remove impurities remaining in the lubricant.

In addition, the contamination of the lubricating oil also detects the differential pressure generated by the car and automatically backwashes the filter, which can save the working time, which has a remarkable effect of high working efficiency.

1 is an assembly diagram of a lubricating oil filtering device used in the present invention.
Figure 2 is a perspective view of a lubricant filtering device used in the present invention.
Figure 3 is an operation diagram of the lubricant filtering device used in the present invention is filtered.
4 is an operation diagram of the lubricating oil filtering device used in the present invention is backwashed.
5 is a flow chart of a method for filtering lubricants of the present invention.
Figure 6 is a flow chart of the backwashing step of Figure 5;

In the lubricating oil filtering method of the present invention, after the lubricating oil flowing through the inlet of the housing is filtered through the filter, the filtering step of discharging to the outside of the housing through the outlet, the impurity accumulation in the filter as the filtering step is repeated Step, the pressure difference between the contaminated part and the clean part of the filter is increased due to the impurities accumulated in the impurity accumulation step, and the pressure difference sensor detects this pressure difference, and the pressure difference detected in the detection step is transmitted to the control unit. , When the pressure difference exceeds the set value by comparing the pressure difference and the set value in the control unit, a backwash command step instructing a command for backwashing the filter with accumulated impurities, the impurity by the backwash command step Characterized in that the accumulated filter includes a backwashing step in which backwashing is performed.

In addition, in the backwashing step, the rotating shaft rotates, and a chamber selection step in which a filter in which impurities are accumulated is communicatively coupled to the chamber in which the impurities are accumulated, and compressed air is introduced into the chamber selected in the chamber selection step, and the compressed air is introduced into the chamber. An impurity removal step of removing impurities from the filter while flowing in the reverse direction in which the lubricating oil is filtered, and an impurity discharge step in which impurities filtered by the impurity removal step are discharged to the outside through a contaminant particle discharge pipe provided with a backwash release valve together with the lubricant. It is characterized by including.

The lubricating oil filtering device used in the present invention includes a housing in which a lubricating oil is introduced and a lubricating oil is discharged, a plurality of filters mounted vertically in a plurality of filter chambers radially formed inside the housing, and the housing It is installed vertically in the center chamber formed in the inner center of the, the motor is coupled to the upper rotation axis, and the casing coupled to have the same central axis as the rotation axis on the lower outer periphery of the rotation shaft, and installed on the side of the housing However, it includes an air tank that is installed in communication with the casing and the inside, and is installed in communication with the interior space of the housing on the bottom surface of the housing, and is equipped with a backwash release valve installed therein.

In addition, a pressure gauge for measuring and detecting the pressure in the filter is installed on one side of the housing, and the differential pressure gauge sends a signal to the control unit when the pressure difference between the contaminated side and the clean side of the filter increases. The backwashing process is performed by the command of the control unit only when the pressure difference received from the differential pressure gauge exceeds a set value.

Hereinafter, the technical spirit of the present invention will be described in more detail with reference to the accompanying drawings.

1 is an assembled view of a lubricating oil filtering device used in the present invention, FIG. 2 is a perspective view of a lubricating oil filtering device used in the present invention, FIG. 3 is an operation diagram in which the lubricating oil filtering device used in the present invention is filtered, and FIG. The operation diagram of the lubricating oil filtering device used in the invention is backwashed, FIG. 5 is a flowchart of the lubricating oil filtering method of the present invention, and FIG. 6 is a flowchart of the backwashing step of FIG. 5.

The accompanying drawings are only examples shown in order to describe the technical spirit of the present invention in more detail, so the technical spirit of the present invention is not limited to the form of the accompanying drawings.

The lubricating oil filtering device 1000 used in the present invention is installed in a lubricating oil storage tank, and filters and discharges lubricating oil flowing into the housing 100, and the rotating shaft 300 and the casing are inside the housing 100. The 400 and the filter 200 are installed.

As illustrated in FIG. 1, a filter space is built in the filter 100 inside the housing 100 to form a filtering space in which lubricant is filtered, and an inlet 110 through which lubricant is introduced is formed at a lower side and an upper side. The outlet 120 through which the filtered lubricant is discharged is formed.

In more detail, a plurality of filter chambers 130 are formed radially inside the housing 100, and the filter chambers 130 are formed in a cylindrical shape with open top and bottom, and each filter chamber ( 130) is composed of independent spaces.

That is, a partition wall is formed inside the housing 100 to form a plurality of filter chambers 130.

In addition, as shown in FIG. 1, a bore hole 132 is formed on an upper side of the filter chamber 130 facing the central axis.

On the other hand, upper and lower pivoting plates are installed horizontally on the upper and lower portions of the housing 100, and the upper pivoting plate opens and closes the bore hole 132 of the chamber, and the lower pivoting plate opens the lower surface of the chamber. It serves to open and close (not shown)

The upper rotating plate and the lower rotating plate are configured to be rotated at a certain angle by separate powers, and are configured to selectively open or close any one or more of a plurality of chambers according to a user's needs.

That is, the plurality of chambers is configured to have a structure that is selectively opened or closed as needed by the upper and lower pivoting plates. In the present invention, the upper and lower pivoting plates are rotated by power to open and close the chamber. Although configured, the chamber may be opened or closed using various means, such as installing valves that open and close the flow path at the upper and lower portions of each chamber.

Meanwhile, a filter 200 is built in each of the plurality of filter chambers 130, and the filter 200 is composed of a plurality of filter elements 210, and the top of the plurality of filter elements 210 is fixed. It is mounted in the filter chamber 130 in a state attached to the member 220.

The fixing member 220 has a disk shape, and a plurality of through holes 222 penetrating up and down are formed in a radial shape, and a hollow pipe having a supply hole 224 formed on its outer circumferential surface is formed to protrude upward. .

1 and 2, since the filter elements 210 are mounted in the through-holes 222 of the fixing member 220, the filter elements 210 are spaced apart at regular intervals and arranged radially. It is built into the filter chamber 130 in the form.

That is, as shown in Figure 3, the lubricating oil is filtered through the filter 200 built in the filter chamber 130, in the present invention, the inlet 110 through which the lubricant flows is lower than the outlet 120 Since it is located in, the lubricating oil is filtered while being moved upward in the filter chamber 130, and the clean lubricating oil filtered through the filter 200 is filtered through the supply hole 224 formed in the fixing member 220 ( 130) It is discharged to the upper space.

In addition, as shown in Figure 2, the upper surface of the fixing member 220 is a cover 230 is coupled, the cover 230 is coupled to the upper surface of the hollow tube of the fixing member 220, the filter chamber It is configured to close the upper surface of 130.

Referring to FIG. 2, when the inner space of the filter chamber 130 is divided into three sections based on the filter 200, the lower space, the filtering space where the filter 200 is inserted, and the upper space, the lower space is substantially The inlet portion where the contaminated lubricant remains, and the upper space is filtered to become the outlet portion where the clean lubricant remains.

In addition, a bore hole 132 is formed at the outer periphery of the upper space, and the clean lubricant is discharged to the outlet 120 through the bore hole 132.

On the other hand, the filter element 210 of the present invention is composed of a magnetic filter formed of a magnetic metal material in a mesh shape, a deep filtration filter, etc., heat resistance, resistance to lubricating oil, strength, pressure resistance, etc. It is preferable to apply a stainless steel-based material having physical properties.

In particular, the magnetic filter element is preferably made of a material having high corrosion resistance and magnetic properties, such as ferritic stainless steel or martensitic stainless steel, to filter particulate matter such as metal particles contained in the lubricant.

In addition, the magnetic filter element is a mesh having a particle diameter of less than 25㎛ to maximize the efficiency of filtering.

On the other hand, a central chamber is formed in the inner center of the housing 100, the rotary shaft 300 is vertically installed in the central chamber.

When the backwashing of the filter 200 is performed, the rotating shaft 300 serves to receive compressed air and transmit it to each filter chamber 130.

As shown in Fig. 4, the rotating shaft 300 is a hollow body having an open top and bottom and a space formed therein, the upper end is bent in an outward direction, and rotated at a certain angle as necessary to rotate each filter chamber 130. It is configured to communicate with.

The rotating shaft 300 is composed of a structure that is rotated at a constant angle by the motor 320, and as the rotating shaft 300 is rotated, the bent top of the rotating shaft 300 has a bore hole in each filter chamber 130 132).

That is, the rotating shaft 300 is configured to have a structure that selectively rotates with each of the plurality of filter chambers 130 while rotating.

And the motor 320 for rotating the rotating shaft 300 is installed on the upper surface of the housing 100, the motor 320 is connected to the upper portion of the rotating shaft 300 to rotate the rotating shaft 300, the present In the present invention, as an example of a motor 320 that rotates the rotating shaft 300, a geared motor is used, and the motor 320 is preferably configured to control the rotation angle of the rotating shaft 300.

In the present invention, a separate coupling bracket 310 is installed on the upper part of the rotating shaft 300 so that the motor 320 is stably seated.

In addition, an air vent 330 is installed on an upper surface of the housing 100 to discharge air in the housing 100.

On the other hand, a casing 400 is coupled to the lower outer circumference of the rotating shaft 300, and the casing 400 is formed of a hollow body having a closed top and bottom, and has the same central axis as the rotating shaft 300. Combined.

In addition, the inner bottom surface of the casing 400 is installed with a space so as not to contact the lower portion of the rotating shaft 300, so that the inner space of the rotating shaft 300 and the inner space of the casing 400 communicate with each other.

And in the present invention, by coupling the flange 410 to the upper surface of the casing 400, the inner space of the center chamber is separated up and down so as not to communicate with each other.

Meanwhile, a backwashing pipe 420 is coupled to an upper side of the casing 400, and the backwashing pipe 420 is connected to the air tank 430, and is supplied from the air tank 430 in the present invention. The filter 200 is backwashed quickly and efficiently by using compressed air.

In addition, a contaminant particle discharge pipe 440 is coupled to the bottom surface of the housing 100 so as to communicate with the interior space of the housing 100, and at the end of the contaminant particle discharge pipe 440, a backwash release valve 442 and a valve actuator ( 444) is installed so that when backwashing the filter 200, impurities trapped by compressed air are discharged to the outside through the contaminant particle discharge pipe 440.

In the present invention, when the differential pressure between the contaminated side and the clean side of the filter 200 increases, the differential pressure gauge 500 sends a signal to the control unit so that the backwashing process is automatically performed.

Accordingly, the present invention is a differential pressure gauge 500 for detecting the pressure difference inside the filter 200, and a control unit for determining the pressure difference received from the differential pressure gauge 500 by comparing with a preset value (pressure difference) ( 600, an air tank 430 and an air valve 432 for supplying compressed air at the command of the control unit 600, a polluted particle discharge pipe 440 for discharging filtered contaminants, and the polluted particle discharge pipe ( It includes a backwash discharge valve installed in 440) and a valve actuator 444 for driving the backwash discharge valve.

As shown in Figure 1, the side of the housing 100 is provided with an air tank 430, the air tank 430 is coupled to communicate with the backwash pipe 420, the air tank ( Compressed air supplied from 430) is transferred to the inner space of the casing 400 through the backwashing pipe 420, so that the filter 200 is backwashed.

The differential pressure gauge 500 used in the present invention includes a plurality of pressure detection sensors, and the pressure detection sensors are installed for each filter 200 to detect a pressure difference in the space inside the filter 200.

The detected pressure difference is transmitted to the control unit 600, and the control unit 600 compares the received pressure difference with a preset pressure difference (set value) to determine.

Referring to FIG. 4, when particulate matter accumulates in the filter 200, the differential pressure between the contaminated side and the clean side of the filter 200 increases, and accordingly the differential pressure gauge 500 is backwashed with the control unit 600. It will send a signal to start it.

As the control unit 600 commands the backwashing, the rotating shaft 300 is rotated in communication with the contaminated filter chamber 130, after which the air valve 432 and the backwashing discharge valve 442 are opened. .

As the air valve 432 is opened, compressed air supplied from the air tank 430 flows into the inner space of the casing 400 and the rotating shaft 300 along the backwash pipe 420, and the rotating shaft 300 It is discharged to the filter chamber 130 in communication with the top of the.

At this time, the compressed air is accompanied by the filtered clean lubricating oil remaining in the upper space of the filter chamber 130, and the clean lubricating oil moves downward in the chamber to remove the contaminant particles of the entire filter 200. , Impurities are discharged out through the contaminant particle discharge pipe 440.

When this process is completed, the air valve 432 and the backwash release valve 442 are closed.

In the present invention, as an embodiment, the normal pressure range in the filter measured and displayed by the differential pressure gauge 500 is set to 1.5 bar to 6 bar, and when it exceeds 6 bar, the control unit 600 is set to be backwashed.

The present invention having such a configuration consists of a structure in which filtering and backwashing proceed simultaneously without interference for each filter, and the lubricating oil filtering device 1000 of the present invention filters the lubricant and backwashes the filter 200. Explain.

First, referring to FIG. 3, the operation in which the lubricant is filtered will be described.

Lubricant oil containing particulate matter is introduced into the housing 100 through the inlet 110, and the introduced lubricant passes through the filter 200 in the process of moving in the direction of the outlet 120.

In the present invention, since the inlet 110 through which the lubricating oil flows is located below the outlet 120, the lubricating oil is filtered while being moved upward in the filter chamber 130 and filtered through the filter 200. Is discharged to the upper space of the filter chamber 130 through the supply hole 224 formed in the fixing member 220.

Thereafter, the clean lubricant is discharged to the outlet 120 through the bore hole 132 formed in the upper space of the filter chamber 130, and the filtering operation is completed.

Hereinafter, an operation of backwashing the filter 200 by the lubricant filtering device 1000 used in the present invention will be described with reference to FIG. 4 as follows.

In the process of filtering the lubricating oil, when particulate matter accumulates in the filter 200, the differential pressure between the contaminated side and the clean side of the filter 200 increases, and accordingly the differential pressure gauge 500 is backwashed with the control unit 600. It will send a signal to start it.

As the control unit 600 commands the backwashing, the rotating shaft 300 is rotated in communication with the contaminated filter chamber 130, after which the air valve 432 and the backwashing discharge valve 442 are opened. .

As the air valve 432 is opened, compressed air supplied from the air tank 430 flows into the inner space of the casing 400 and the rotating shaft 300 along the backwash pipe 420, and the rotating shaft 300 It is discharged to the filter chamber 130 in communication with the top of the.

At this time, the compressed air is accompanied by the filtered clean lubricating oil remaining in the upper space of the filter chamber 130, and the clean lubricating oil moves downward in the chamber to remove the contaminant particles of the entire filter 200. , Impurities are discharged out through the contaminant particle discharge pipe 440.

When this process is completed, the air valve 432 and the backwash release valve 442 are closed.

Hereinafter, the lubricating oil is filtered using the lubricating oil filtering device 1000 used in the present invention, and the method of backwashing the filter 200 in which impurities are accumulated in the filter 200 is repeated as the filtering operation is repeated. It is described as.

The lubricating oil filtering method of the present invention is a filtering step in which lubricating oil flows through the inlet 110 of the housing 100 and is filtered through the filter 200, then discharged out of the housing 100 through the outlet 120, As the filtering step is repeated, the impurity accumulation step in which impurities accumulate in the filter 200, and the pressure difference between the contaminated and clean parts of the filter 200 increases due to the impurities accumulated in the impurity accumulation step. The sensing step in which the differential pressure gauge 500 detects the difference, the pressure difference detected in the sensing step is transmitted to the control unit 600, and the pressure difference is compared with the set value in the control unit 600 to set the pressure difference. When exceeded, a backwashing command step instructing a command for backwashing the filter 200 in which impurities are accumulated, a backwashing step in which the filter 200 in which impurities are accumulated is backwashed by the backwashing command step; Is done.

In addition, the backwashing command of the backwashing command step rotates the rotating shaft, so that the filter chamber 130 in which the filter 200 in which impurities are accumulated is built-in, the rotating shaft communicates with the air tank 430. And opening the backwash release valve 442 coupled to the contaminant particle discharge pipe 440 through which the compressed air is supplied into the chamber and impurities collected by the compressed air are discharged together with the lubricant.

In addition, in the backwashing step, the rotating shaft 300 rotates, and a chamber selection step in which the filter 200 in which impurities are accumulated is communicatively coupled to the chamber into which the impurities are accumulated, and compressed air flows into the chamber selected in the chamber selection step. However, the compressed air flows in a reverse direction in which the lubricating oil is filtered in the chamber, and an impurity removing step of removing impurities from the filter 200, and impurities filtered by the impurity removing step are provided with a backwash release valve 442 together with the lubricating oil. It is composed of an impurity discharge step discharged to the outside through the installed pollution particle discharge pipe (440).

Therefore, the present invention improves productivity because the filter is automatically backwashed by detecting the differential pressure generated by the degree of contamination of the lubricant, and the filtering and backwashing are constructed simultaneously and independently without interference, so that the equipment can be operated continuously without stopping the system. This has a remarkable effect possible.

1000: lubricating oil filtering device
100: housing 110: inlet
120: outlet 130: filter chamber
132: Borehole
200: filter 210: filter element
220: fixing member 222: through hole
224: supply hole 230: cover
300: rotating shaft 310: coupling bracket
320: Motor 330: Air vent
400: casing 410: flange
420: backwash pipe 430: air tank
432: air valve
440: pollution particle discharge pipe 442: backwash release valve
444: valve actuator
500: differential pressure gauge 600: control unit
700: Support bracket
S100: Filtering step S200: Impurity accumulation step
S300: Detection step S400: Backwashing command step
S500: Backwashing step S510: Chamber selection step
S520: Impurity removal step S530: Impurity discharge step

Claims (2)

On the side surface, an inlet through which lubricant is introduced and an outlet through which lubricant is discharged are formed, and a housing equipped with an air vent for discharging air on the upper surface;
A plurality of filters respectively vertically mounted to a plurality of filter chambers formed radially inside the housing;
A rotating shaft vertically installed in a central chamber formed in an inner central portion of the housing, the motor being coupled to the upper portion and rotated;
A casing which is installed inside the housing and is coupled to have the same central axis as the rotational axis on the lower outer circumference of the rotational axis;
Is installed on the side of the housing, the air tank is installed to communicate with the casing inside;
Included on the bottom surface of the housing to be installed in communication with the interior space of the housing, and a backwash release valve installed therein;
The filter is composed of a plurality of filter elements, the plurality of filter elements are embedded in the filter chamber with the top mounted on the fixing member, and the fixing member is a disk formed by a plurality of radially through holes penetrating the top and bottom. In the center, a hollow tube with a supply hole is formed to protrude upward,
The rotating shaft is a hollow body having an upper and lower opening and a space formed therein, the upper end is bent in the outer direction, and is provided to selectively communicate with a plurality of filter chambers as it is rotated, and the compressed air supplied from the air tank is rotated. And selectively communicated to the filter chamber,
A flange is coupled to the upper surface of the casing to separate the inner space of the center chamber up and down, and is provided with a space portion so that the inner bottom surface does not contact the lower part of the rotating shaft, so that the inner space of the rotating shaft and the inner space of the casing are Arranged to communicate with each other,
A backwashing pipe is coupled to the upper side of the casing, and the backwashing pipe is connected to an air tank. Compressed air supplied from the air tank is passed through the backwashing pipe into the casing inner space, the rotating shaft inner space, and the filter chamber. In the lubricating oil filtering method for filtering the lubricating oil using a lubricating oil filtering device characterized in that it is sequentially transferred,
A filtering step in which the lubricating oil flowing through the inlet of the housing is filtered through a filter and then discharged out of the housing through the outlet;
An impurity accumulation step in which impurities are accumulated in the filter as the filtering step is repeated;
A differential step of increasing the differential pressure between the contaminated and clean parts of the filter due to the impurities accumulated in the impurity accumulation step, and a sensing step in which the differential pressure gauge senses the pressure difference;
The pressure difference detected in the detection step is transmitted to the control unit, and when the pressure difference exceeds the set value by comparing the pressure difference and the set value in the control unit, instructs a command for backwashing the filter in which impurities are accumulated. Backwash order step;
Including the backwashing step of backwashing the filter is the impurity accumulated by the backwashing command step;
The backwashing step,
A chamber selection step in which the rotating shaft is rotated so that a filter in which impurities are accumulated is communicatively coupled to the chamber in which the impurities are accumulated;
An impurity removing step in which compressed air is introduced into the chamber selected in the chamber selection step, and the compressed air flows in a reverse direction in which lubricant is filtered in the chamber to remove impurities from the filter;
The impurities filtered by the impurity removal step include an impurity discharge step that is discharged to the outside through a contaminant particle discharge pipe provided with a backwash discharge valve together with a lubricant.
The compressed air in the backwashing step is accompanied by the filtered clean lubricating oil remaining in the upper space of the filter chamber, and the clean lubricating oil moves downward in the chamber to remove contaminant particles of the entire filter, and impurities are contaminated. Filtering method for lubricant, characterized in that it is discharged through the particle discharge pipe.
delete

Images