Self-cleaning filter of diesel engine lubricating system and working method of self-cleaning filter

Abstract

The invention belongs to the technical field of marine diesel engines, and discloses a diesel engine lubricating system self-cleaning filter and a working method thereof.The diesel engine lubricating system self-cleaning filter comprises a base, an oil inlet, an oil outlet and a first shell, the first shell is a hollow cylinder with one open end, and the open end is detachably connected with the base; one end of the filtering device is connected with the base, and the other end of the filtering device is connected with the sealed end of the first shell; a first pressure sensor and a second pressure sensor are respectively arranged on the outer circumferential surface and the inner circumferential surface of the filtering device; a filter element and an ultrasonic transmitter are arranged in the filter device; a filtering door is arranged on the circumferential surface of the filtering device and comprises an open hole and a sliding block. According to the self-cleaning filter, the pressure before and after filtering is detected in real time, the filter element can be cleaned in time when the pressure difference is too large, the efficient filtering performance of the filter is guaranteed, the filter element blocking risk is reduced, and the service life of the filter element is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of marine diesel engines, and in particular to a self-cleaning filter of a diesel engine lubrication system and a working method thereof. Background Art

[0002] As an important power source in modern industry, transportation and power generation, the reliability and efficiency of diesel engines directly affect the overall production efficiency and economic cost. The lubrication system is an indispensable part of diesel engines. It continuously supplies lubricating oil, reduces friction between moving parts, removes heat, prevents wear, and removes impurities, thereby ensuring the normal operation of the engine and extending its service life.

[0003] In the lubrication system of diesel engines, filters play a vital role. Its main task is to remove impurities such as solid particles, wear debris, oxidation products, etc. in the lubricating oil, ensure the cleanliness of the lubricating oil, and prevent these impurities from causing damage to the engine, such as scratching the bearing, blocking the oil circuit, and accelerating wear. Therefore, the performance of the filter directly affects the overall efficiency of the lubrication system and the health of the diesel engine. However, traditional diesel engine lubrication system filters have limitations. As the use time increases, the degree of clogging of the filter element increases, which may lead to increased pressure loss. In severe cases, it may even force the bypass valve to open, bypassing the filter and reducing the filtration efficiency. Summary of the invention

[0004] In order to solve the problem of the limitation of the diesel engine lubrication system filter in the above-mentioned prior art that the filter element is blocked and the filtering effect is reduced, the present invention proposes a diesel engine lubrication system self-cleaning filter and a working method thereof, which can monitor the pressure before and after the filtration in real time for each filter element, and automatically start the self-cleaning program to clean the filter element when the blockage degree reaches a preset threshold, thereby improving the stability of the diesel engine lubrication system.

[0005] The present invention is realized by the following technical scheme: comprising a base, a first shell detachably connected to the base, and an oil inlet and an oil outlet arranged on the first shell, wherein the first shell is a hollow cylinder with an opening at one end and the open end is detachably connected to the base, and the oil inlet and the oil outlet are both arranged at the sealing end of the first shell; further comprising a filtering device arranged inside the first shell, wherein one end of the filtering device is connected to the base and the other end is connected to the sealing end of the first shell, a gap exists between the filtering device and the inner wall of the first shell in the circumferential direction, and the oil inlet is arranged at the gap between the filtering device and the first shell; the filtering device is cylindrical as a whole and a through hole is arranged at the center of the cylinder along the axial direction, and the outer circumferential surface and the inner circumferential surface of the filtering device are respectively provided with a first pressure sensor and a second pressure sensor; a filter element and an ultrasonic transmitter are arranged inside the filtering device; a filter door is arranged on the circumferential surface of the filtering device, and the filter door includes an opening arranged on the circumferential surface of the filtering device and a slider arranged inside the filtering device.

[0006] As a further preference, the filtering device is divided into a number of filtering units along the circumferential direction; a first pressure sensor is arranged on the large arc of the filtering unit, and a second pressure sensor is arranged on the small arc; and a filter element and an ultrasonic transmitter are arranged inside each filtering unit.

[0007] As a further preference, the filtering device also includes a micro-motion unit arranged on the arc surface of the filtering unit, the micro-motion unit includes a second shell, the second shell is embedded in the filtering unit, a motor is arranged on the outside of the second shell, the motor output end passes through the second shell and is fixedly connected to the gear inside the second shell, the gear is meshed with the upper rack, and the upper rack is fixedly connected to the slider of the filter door.

[0008] As a further preference, there are two groups of filter doors on the filter unit, which are symmetrically arranged relative to the micro-motion unit.

[0009] As a further preference, the micro-motion unit further comprises a lower rack meshing with the gear, the upper rack and the lower rack are rotationally symmetrical with respect to the gear, and the upper rack and the lower rack are respectively fixedly connected to a group of sliders of the filter door.

[0010] As a further preference, the number of the filter units is six.

[0011] As a further preference, a cover plate is provided between the filter device and the first shell; the cover plate cooperates with the sealing end of the first shell.

[0012] As a further preference, a check valve may be provided between the cover plate and the filter device.

[0013] As a further preference, the filter door is arranged along the axial direction of the filter device.

[0014] The present invention also provides a working method applicable to the self-cleaning filter of the diesel engine lubrication system, comprising the following steps:

[0015] Step 1: The diesel engine lubrication system starts and the self-cleaning filter starts working;

[0016] Step 2: The first pressure sensor and the second pressure sensor monitor the oil pressure inside and outside the filter device in real time;

[0017] Step 3: When the oil pressure difference exceeds the set threshold, the micro-motion unit starts, the motor drives the gear to rotate, and the rotation of the gear is converted into the linear motion of the upper rack and the lower rack, driving the slider of the filter door to cover the opening of the filter door, isolating the connection between the filter unit and the oil circulation;

[0018] Step 4: Self-cleaning starts, and the ultrasonic transmitter emits high-frequency vibration waves to act on the surface of the filter element to loosen and remove solid particles and impurities deposited on the filter element;

[0019] Step 5: After the self-cleaning process is completed, the micro-motion unit operates in the reverse direction, the motor reverses to drive the gear reverse, the movement of the upper rack and the lower rack reopens the filter door, and the oil flow is restored;

[0020] Step 6. If the filter element cannot resume normal operation after cleaning, or the filter element is severely clogged and cannot be restored by self-cleaning, disassemble the filter unit and replace the filter element.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The self-cleaning filter of the present invention adopts multi-stage filtration, which can keep other filter elements running without stopping during the cleaning of a single filter element, thereby improving the utilization rate of the equipment and reducing production interruptions.

[0023] 2. The self-cleaning filter of the present invention detects the pressure before and after filtration in real time. When the pressure difference is too large, the filter element can be cleaned in time to ensure the efficient filtering performance of the filter, reduce the risk of filter element clogging, and extend the life of the filter element.

[0024] 3. The filtering device in the self-cleaning filter of the present invention adopts a concave-convex structure connection method, so that the filter element can be quickly disassembled and replaced after being blocked for a long time, which greatly simplifies the maintenance process.

[0025] 4. The design of the present invention saves resources, reduces waste, has strong adaptability, can be applied to various types of diesel engine lubrication systems and other equipment that requires filtration, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a front view of the self-cleaning filter of the present invention.

[0027] Figure 2 It is an exploded view of the self-cleaning filter of the present invention.

[0028] Figure 3 It is a half-section view of the self-cleaning filter of the present invention.

[0029] Figure 4 It is a schematic diagram of the filtering device of the self-cleaning filter of the present invention.

[0030] Figure 5 It is a front view of the filter unit of the self-cleaning filter of the present invention.

[0031] Figure 6 It is a rear view of the filter unit of the self-cleaning filter of the present invention.

[0032] Figure 7 It is a cross-sectional view of a filter unit of the self-cleaning filter of the present invention.

[0033] Figure 8 It is a schematic diagram of the micro-motion unit of the self-cleaning filter of the present invention.

[0034] Indicated in the figure:

[0035] 10. Main body; 11. Oil inlet; 12. Oil outlet; 13. Cover plate; 14. Check valve; 15. First shell; 16. Filter device; 17. Base; 161. Filter unit; 1611. First pressure sensor; 1612. Second pressure sensor; 1613. Filter door; 1614. Filter element; 1615. Ultrasonic transmitter; 162. Micro motion unit; 1621. Motor; 1622. Gear; 1623. Upper rack; 1624. Lower rack; 1625. Second shell. DETAILED DESCRIPTION

[0036] Advantages and features of the present invention will be illustrated and explained by the following non-limiting description of preferred embodiments thereof, which are given by way of example only with reference to the accompanying drawings.

[0037] like Figure 1 As shown, the present invention provides a self-cleaning filter for a diesel engine lubrication system, comprising a body 10, an oil inlet 11, an oil outlet 12, a first housing 15 and a base 17. The first housing 15 is cylindrical as a whole, and one side of the two planes of the first housing 15 is detachably connected to the base 17. The oil inlet 11 and the oil outlet 12 are both arranged on a side of the first housing 15 away from the base 17. The oil outlet 12 is arranged at the center of the side of the first housing 15 away from the base 17, and the oil inlet 11 is arranged at a position close to the edge of the side of the first housing 15 away from the base 17.

[0038] like Figure 2and Figure 3 As shown, Figure 2 This is an exploded view of the self-cleaning filter according to the present invention. Figure 3 The figure is a half-section view of the self-cleaning filter of the present invention, wherein the self-cleaning filter further comprises a filter device 16 disposed inside the first housing 15. The self-cleaning filter of the present invention filters impurities in the diesel engine lubrication system through the filter device 16 inside. The first housing 15 is a hollow cylinder with an opening at one end, and the open end of the first housing 15 is detachably connected to the base 17, preferably connected by threads. The base 17 provides support for the entire filter structure. One end of the filter device 16 is connected to the base 17, and the other end is connected to the sealing end of the first housing 15. A cover plate 13 is disposed between the filter device 16 and the first housing 15. The cover plate 13 cooperates with the sealing end of the first housing 15 to play a sealing role. A check valve 14 can also be disposed between the cover plate 13 and the filter device 16, so as to ensure the one-way flow of the engine oil and prevent backflow. The check valve 14 opens under the action of the engine oil pressure, and the engine oil is filtered and processed by the filter device 16, and the clean engine oil flows out from the oil outlet 12. The first housing 15 is the main part of the body 10 and is used to carry all internal parts. There is a gap between the filter device 16 and the inner wall of the first housing 15 in the circumferential direction, and the oil inlet 11 is arranged at the gap between the filter device 16 and the first housing 15. The filter device 16 is cylindrical as a whole and a through hole is arranged in the center of the cylinder along the axial direction, that is, the cross section of the filter device 16 perpendicular to the axial direction is annular. The outer circumferential surface of the filter device 16, that is, the side close to the first housing 15, is provided with a first pressure sensor 1611, and the inner circumferential surface of the filter device 16 is provided with a second pressure sensor 1612. A filter element 1614 and an ultrasonic transmitter 1615 are arranged inside the filter device 16. The ultrasonic transmitter 1615 is arranged at a position close to the outer circumferential surface inside the filter device 16. The filter element 1614 is arranged between the ultrasonic transmitter 1615 and the inner circumferential surface of the filter device 16.

[0039] The filter device 16 is cylindrical in shape and has a through hole in the center of the cylinder. The filter device 16 is evenly divided into a plurality of filter units 161 along the circumferential direction, that is, the filter device 16 is composed of a plurality of filter units 161 spliced ​​together along the circumferential direction, and the number of the filter units 161 is preferably 6. Figures 4 to 6As shown, the filter unit 161 is composed of two arcs, one large and one small, and two straight ends along the axial direction of the filter device 16. The large arc is close to the first housing 15, and the small arc is far away from the first housing 15. A first pressure sensor 1611 is arranged on the large arc of the filter unit 161, and a second pressure sensor 1612 is arranged on the small arc. A filter door 1613 is arranged on both the large arc and the small arc of the filter unit 161, and a filter element 1614 and an ultrasonic transmitter 1615 are arranged inside the filter unit 161. The ultrasonic transmitter 1615 is arranged at a position close to the large arc inside the filter unit 161. The filter element 1614 is arranged between the ultrasonic transmitter 1615 and the small arc of the filter unit 161. The filter door 1613 can be opened and closed freely. When opened, the filter unit 161 performs the filtering work of the engine oil normally, and when closed, the filter element 1614 performs the self-cleaning work. The filter door 1613 is preferably arranged along the axial direction of the filter device 16. In order to make the direct splicing of each filter unit 161 more secure and prevent it from detaching during operation, a protrusion and a corresponding groove can be set at the splicing position of the two filter units 161. The filter door 1613 includes two parts, one is an opening set on the arc surface of the filter unit 161, which can also be a groove, and the other is a slider set inside the filter unit 161, and the size of the opening is smaller than the slider. When the filter door 1613 needs to be closed, the slider moves to cover the opening; when the filter door 1613 needs to be opened, the slider moves to expose the opening.

[0040] Under normal working conditions, the engine oil enters the filter through the oil inlet 11, and after being filtered by the filter element 1614, it flows out from the oil outlet 12 and continues to participate in the lubrication cycle of the diesel engine. When the filter element 1614 is blocked, the pressure difference detected by the first pressure sensor 1611 and the second pressure sensor 1612 is greater than the set threshold, the self-cleaning system of the filter is activated, the filter door 1613 is closed, and the self-cleaning mode of the filter device 16 is started. If the filter element 1614 is severely blocked and cannot be restored by self-cleaning, the filter element 1614 can be easily removed through the protrusion and groove structure on the filter unit 161 for thorough cleaning or replacement.

[0041] like Figures 5 to 8As shown, the filtering device 16 also includes a micro-motion unit 162, which is arranged on the arc surface of the filtering unit 161, preferably a large arc surface. The micro-motion unit 162 is preferably arranged in the middle of the large arc surface of the filtering unit 161. The micro-motion unit 162 includes a second shell 1625, which is embedded in the filtering unit 161 and sealed with it. A motor 1621 is arranged on the outside of the second shell 1625, and the output end of the motor 1621 passes through the second shell 1625 and is fixedly connected to the gear 1622 inside the second shell 1625. An upper rack 1623 and a lower rack 1624 are respectively engaged on the gear 1622. The upper rack 1623 and the lower rack 1624 are rotationally symmetrical with respect to the gear 1622. Here, the filter door 1613 on the filtering unit 161 is preferably two groups, which are symmetrically arranged with respect to the micro-motion unit 162. The upper rack 1623 and the lower rack 1624 are respectively fixedly connected to a group of sliders of the filter door 1613. The opening and closing of the filter door 1613 are controlled by the forward and reverse rotation of the motor 1621. Similarly, the micro-motion unit 162 structure can also be set at the small arc surface of the filter unit 161. When the self-cleaning is started, the motor 1621 drives the gear 1622 to rotate, and the rotation of the gear 1622 is converted into the linear motion of the upper rack 1623 and the lower rack 1624 to achieve synchronous motion. The movement of the upper and lower racks drives the slider of the filter door 1613 to cover the opening of the filter door 1613, so that it is closed, and the connection between the filter unit 161 and the oil circulation is cut off, creating a closed environment for the self-cleaning process. After the self-cleaning program is completed, the micro-motion unit 162 operates in the reverse direction, that is, the motor 1621 reverses to drive the gear 1622 to reverse, and the movement of the upper and lower racks reopens the filter door 1613, and the self-cleaning filter returns to a normal working state.

[0042] The filter unit 161 is the core part of the self-cleaning filter described in the present invention, and includes all key components for realizing filtering and self-cleaning functions. The first pressure sensor 1611 is located on the outside of the filter unit 161, and is used to monitor the pressure on the unfiltered oil side, that is, the pressure on the oil inlet side of the body 10. The second pressure sensor 1612 is located on the inside of the filter unit 161, and monitors the pressure on the filtered oil side, that is, the pressure on the outlet side of the body 10. The filter door 1613 structure can be closed freely during the self-cleaning process to prevent the oil from flowing and ensure the smooth progress of the self-cleaning process. The filter element 1614 is located in the center of the filter unit 161 and is made of multiple layers of filter materials of different materials, which can effectively remove impurities and particles in the oil. The ultrasonic transmitter 1615 is near the filter element 1614 and is used to emit ultrasonic waves in the cleaning mode to loosen and remove the sediment on the filter element 1614 through high-frequency vibration. The micro-motion unit 162 controls the opening and closing action of the filter door 1613. When self-cleaning is required, the micro-motion unit 162 will close the filter door 1613, isolate the filter element 1614, and prepare to start the self-cleaning program. The first pressure sensor 1611 and the second pressure sensor 1612 continuously monitor the pressure difference between the inside and outside of the filter unit 161. When the pressure difference exceeds the set threshold, it indicates that the filter element 1614 is clogged and needs to be cleaned. At this time, the system will automatically start the self-cleaning program. In the self-cleaning mode, the ultrasonic transmitter 1615 is immediately activated, and the high-frequency vibration generated acts on the filter element 1614 to loosen and remove impurities deposited on its surface, restoring the filtering performance of the filter element 1614.

[0043] The present invention also provides a working method for the self-cleaning filter of the diesel engine lubrication system of the present invention, comprising the following steps:

[0044] Step 1: The diesel engine lubrication system starts and the self-cleaning filter starts working.

[0045] Step 2: The first pressure sensor 1611 and the second pressure sensor 1612 installed on the filter unit 161 monitor the pressure difference before and after the oil passes through the filter element 1614 in real time.

[0046] Step 3: When the pressure difference exceeds the set threshold, the micro-motion unit 162 is started, the motor 1621 drives the gear 1622 to rotate, and the rotation of the gear 1622 is converted into the linear motion of the upper rack 1623 and the lower rack 1624 to achieve synchronous motion. The movement of the upper and lower racks drives the slider of the filter door 1613 to cover the opening of the filter door 1613, closing it and isolating the connection between the filter unit 161 and the oil circulation. At this time, the oil flow is blocked, and the filter element 1614 is isolated from the oil circulation to ensure that no oil flows into the filter element 1614 during the self-cleaning process.

[0047] Step 4: Self-cleaning is started, and the ultrasonic transmitter 1615 emits high-frequency vibration waves to act on the surface of the filter element 1614 to help loosen and remove solid particles and impurities deposited on the filter element 1614.

[0048] Step 5: After the self-cleaning process is completed, the micro-motion unit 162 operates in the reverse direction, the motor 1621 reverses to drive the gear 1622 to reverse, the movement of the upper and lower racks reopens the filter door 1613, the oil flow is restored, and the filter element 1614 participates in oil filtering again.

[0049] Step 6. If the filter element 1614 cannot resume normal operation after cleaning, or the filter element 1614 is severely clogged and cannot be restored by self-cleaning, disassemble the filter unit 161 with a concave-convex structure design and replace the filter element 1614 to maintain the high efficiency performance of the self-cleaning filter.

[0050] In addition to the above embodiments, the present invention may also have other implementation modes. Any technical solutions formed by equivalent replacement or equivalent transformation shall fall within the protection scope required by the present invention.

Claims

1. A self-cleaning filter for a diesel engine lubrication system, comprising a base (17), a first housing (15) detachably connected to the base (17), and an oil inlet (11) and an oil outlet (12) provided on the first housing (15), characterized in that: The first housing (15) is a hollow cylinder with an open end, and the open end is detachably connected to the base (17); the oil inlet (11) and the oil outlet (12) are both arranged at the sealed end of the first housing (15); and the first housing (15) further comprises a filter device (16) arranged inside the first housing (15); one end of the filter device (16) is connected to the base (17), and the other end is connected to the sealed end of the first housing (15); there is a gap between the filter device (16) and the inner wall of the first housing (15) in the circumferential direction; the oil inlet (11) is arranged between the filter device (16) and the first housing (15); The filter device (16) is cylindrical in shape as a whole and a through hole is provided at the center of the cylinder along the axial direction; the outer circumferential surface and the inner circumferential surface of the filter device (16) are provided with a first pressure sensor (1611) and a second pressure sensor (1612), respectively; a filter element (1614) and an ultrasonic transmitter (1615) are provided inside the filter device (16); a filter door (1613) is provided on the circumferential surface of the filter device (16), and the filter door (1613) comprises an opening provided on the circumferential surface of the filter device (16) and a slider provided inside the filter device (16).

2. The self-cleaning filter for the diesel engine lubrication system according to claim 1, characterized in that: The filtering device (16) is evenly divided into a plurality of filtering units (161) along the circumferential direction; a first pressure sensor (1611) is arranged on the large arc of the filtering unit (161), and a second pressure sensor (1612) is arranged on the small arc; and a filter element (1614) and an ultrasonic transmitter (1615) are arranged inside each filtering unit (161).

3. The self-cleaning filter for the diesel engine lubrication system according to claim 2, characterized in that: The filtering device (16) further comprises a micro-motion unit (162) arranged on the arc surface of the filtering unit (161); the micro-motion unit (162) comprises a second shell (1625); the second shell (1625) is embedded in the filtering unit (161); a motor (1621) is arranged on the outside of the second shell (1625); an output end of the motor (1621) passes through the second shell (1625) and is fixedly connected to a gear (1622) inside the second shell (1625); the gear (1622) is meshed with an upper rack (1623); and the upper rack (1623) is fixedly connected to a slider of the filter door (1613).

4. The self-cleaning filter for the diesel engine lubrication system according to claim 3, characterized in that: The filter doors (1613) on the filter unit (161) are provided in two groups, and are symmetrically arranged relative to the micro-motion unit (162).

5. The self-cleaning filter for the diesel engine lubrication system according to claim 4, characterized in that: The micro-motion unit (162) further comprises a lower rack (1624) meshing with the gear (1622); the upper rack (1623) and the lower rack (1624) are rotationally symmetrical relative to the gear (1622); the upper rack (1623) and the lower rack (1624) are respectively fixedly connected to a set of sliders of the filter door (1613).

6. The self-cleaning filter for the diesel engine lubrication system according to claim 5, characterized in that: The number of the filtering units (161) is six.

7. The self-cleaning filter for the diesel engine lubrication system according to claim 5, characterized in that: A cover plate (13) is provided between the filtering device (16) and the first outer shell (15); the cover plate (13) cooperates with the sealing end of the first outer shell (15).

8. The self-cleaning filter for the diesel engine lubrication system according to claim 5, characterized in that: A check valve (14) may also be provided between the cover plate (13) and the filter device (16).

9. The self-cleaning filter for the diesel engine lubrication system according to claim 5, characterized in that: The filter door (1613) is arranged along the axial direction of the filter device (16).

10. A working method for the self-cleaning filter of a diesel engine lubrication system according to any one of claims 5 to 9, characterized in that: The steps include: Step 1: The diesel engine lubrication system starts and the self-cleaning filter starts working; Step 2: The first pressure sensor (1611) and the second pressure sensor (1612) monitor the oil pressure inside and outside the filter device (16) in real time; Step 3: When the oil pressure difference exceeds a set threshold, the micro-motion unit (162) is started, the motor (1621) drives the gear (1622) to rotate, and the rotation of the gear (1622) is converted into a linear motion of the upper rack (1623) and the lower rack (1624), driving the slider of the filter door (1613) to cover the opening of the filter door (1613), thereby isolating the connection between the filter unit (161) and the oil circulation; Step 4: Self-cleaning is started, and the ultrasonic transmitter (1615) emits high-frequency vibration waves to act on the surface of the filter element (1614) to loosen and remove solid particles and impurities deposited on the filter element (1614); Step 5: After the self-cleaning process is completed, the micro-motion unit (162) operates in the reverse direction, the motor (1621) rotates in the reverse direction to drive the gear (1622) to rotate in the reverse direction, and the movement of the upper rack (1623) and the lower rack (1624) reopens the filter door (1613), and the oil flow is restored; Step 6: If the filter element (1614) cannot resume normal operation after cleaning, or the filter element (1614) is severely clogged and cannot be restored by self-cleaning, disassemble the filter unit (161) and replace the filter element (1614).

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