An oil filtering device

Abstract

The utility model relates to machine lubricating technical field, concretely is a kind of oil filtering equipment, including rack, gyro wheel, ordinary grade filter, first precision grade filter, second precision grade filter, oil pump motor, oil pipe and hydraulic gauge, by closed filter loop design, can actively introduce the oil liquid in oil tank into equipment and filter, solve the limitation that only part of oil liquid in oil pipe can be filtered in prior art, can completely remove the foreign matter deposited in oil tank, guarantee oil liquid cleanliness from source, gyro wheel type moving structure makes equipment can be easily moved to the oil tank beside different position, for the filtering demand of large equipment oil tank or multiple oil tanks can be satisfied, use flexibility significantly improves, three grade filters are filtered respectively to large, medium and small particle foreign matter, filtering precision improves gradually, compared with single filter can more comprehensively remove various foreign matters in oil liquid.

Description

Technical Field

[0001] This utility model relates to the field of machine lubrication technology, specifically to an oil filtration device. Background Technology

[0002] As is well known, in the daily use and maintenance of machine lubrication systems, the oil tank, as a storage container for oil, directly affects the service life of key equipment such as oil pumps due to the cleanliness of the oil inside.

[0003] In existing technologies, after the oil in the tank has been left for a long time, foreign objects such as dust and particles can easily enter the oil through pipe joints, tank openings, etc. As time goes by, the amount of foreign objects in the oil will gradually increase. When the oil pump is tested or working, these foreign objects will enter the oil pump with the oil, causing the oil pump to jam, wear or even be damaged, increasing the maintenance cost and downtime of the equipment.

[0004] To alleviate this problem, existing technologies typically add a temporary filter at the front end of the oil pump, filtering the oil flowing from the tank into the oil pipe only during each pump test. However, this filtration method has significant drawbacks: First, the filtration scenario is limited, passively filtering only a portion of the oil flowing through the oil pipe during pump testing, unable to actively and thoroughly filter the oil in the entire tank, making it difficult to remove foreign matter deposited at the bottom or corners of the tank. Second, the filtration level is singular; a single filter cannot achieve graded filtration for foreign matter of different sizes, and its filtration effect on fine particles is limited. Third, the equipment is fixed; existing filtration devices are mostly fixed structures, unable to be flexibly moved according to the location of different oil tanks, resulting in poor adaptability to the filtration needs of large equipment tanks or multiple oil tanks. Fourth, maintenance is inconvenient; the accumulation of foreign matter inside the filter is difficult to visually assess, and cleaning requires disassembling multiple components, making the operation cumbersome. Utility Model Content

[0005] In order to overcome the problems of limited filtration scenarios, single filtration level and fixed equipment in existing oil filtration equipment, this utility model provides an oil filtration device that features active filtration, graded purification, flexible mobility and convenient maintenance.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an oil filtration device, comprising:

[0007] frame;

[0008] Rollers, which are located at the bottom of the frame, are used to enable the overall movement of the equipment;

[0009] A standard-grade filter, which is fixedly installed on the frame;

[0010] The first precision filter is fixedly mounted on the frame;

[0011] The second precision filter is fixedly mounted on the frame.

[0012] Oil pump motor, which is fixedly mounted on the frame;

[0013] The oil pipe is connected in series via connectors to the oil tank outlet, the inlet of the ordinary filter, the outlet of the ordinary filter and the inlet of the oil pump motor, the outlet of the oil pump motor and the inlet of the first precision filter, the outlet of the first precision filter and the inlet of the second precision filter, and the outlet of the second precision filter and the oil tank return port, forming a closed filtration circuit; and

[0014] The hydraulic gauges are installed on the housings of the ordinary filter, the first precision filter, and the second precision filter, respectively, and are used to monitor the pressure changes inside the corresponding filters in real time.

[0015] Preferably, there are four rollers, symmetrically distributed at the four corners of the bottom of the frame, and each roller is equipped with a braking structure that can lock the rotation of the roller when the equipment is working.

[0016] Furthermore, the ordinary filter, the first precision filter, and the second precision filter are all detachable structures. Each of the ordinary filter, the first precision filter, and the second precision filter consists of an upper shell and a lower shell. The upper shell and the lower shell are detachably connected by bolts evenly distributed around the circumference. After disassembly, the accumulated foreign matter inside can be directly cleaned.

[0017] Furthermore, the ordinary-grade filter is used to filter large particulate foreign matter in the oil, and the internal filter element of the ordinary-grade filter has a coarse filtration accuracy. The first precision-grade filter is used to filter medium-sized particulate foreign matter in the oil, and the internal filter element of the first precision-grade filter has a medium filtration accuracy, which is higher than that of the ordinary-grade filter. The second precision-grade filter is used to filter small particulate foreign matter in the oil, and the internal filter element of the second precision-grade filter has a fine filtration accuracy, which is higher than that of the first precision-grade filter.

[0018] In a further embodiment, the connector is a quick-plug connector, both ends of the oil pipe are fixedly connected to the connector through a snap-fit ​​structure, and the interfaces of the connector with the ordinary filter, the first precision filter, the second precision filter and the oil pump motor are all sealed connections.

[0019] Based on the aforementioned scheme, the hydraulic gauge is connected to the housing of the corresponding filter via a threaded interface. The sensing end of the hydraulic gauge extends into the filter and can directly detect the pressure value of the oil flowing through the filter. When the pressure value exceeds a preset threshold, it indicates that foreign objects inside the filter need to be cleaned.

[0020] Furthermore, based on the aforementioned solution, the frame is made of lightweight alloy material, and the frame is equipped with mounting bases for fixing the ordinary filter, the first precision filter, the second precision filter and the oil pump motor. The mounting bases are equipped with positioning structures to ensure that the positions of each component are stable after installation.

[0021] Furthermore, based on the aforementioned solution, a control switch is also included. The control switch is mounted on the frame and electrically connected to the oil pump motor, and is used to control the start and stop of the oil pump motor. The control switch is equipped with an indicator light to display the working status of the oil pump motor.

[0022] Beneficial effects

[0023] This oil filtration equipment, through its closed-loop filtration design, actively introduces all the oil in the tank into the equipment for filtration, overcoming the limitation of existing technologies that can only filter a portion of the oil in the oil pipes. It can thoroughly remove foreign matter deposited in the tank, ensuring oil cleanliness from the source. The roller-type mobile structure allows the equipment to be easily moved to different locations next to oil tanks, making it suitable for various scenarios such as factories, repair workshops, and laboratories. It can meet the filtration needs of large equipment tanks or multiple tanks, significantly improving its flexibility. The three-stage filter targets large, medium, and small particles respectively, with progressively increasing filtration precision. Compared to a single filter, it can more comprehensively remove various foreign matter from the oil, resulting in higher oil cleanliness and effectively reducing the risk of damage to equipment such as oil pumps. The hydraulic gauge monitors the internal pressure of the filter in real time, allowing operators to accurately judge the accumulation of foreign matter without frequent disassembly and inspection. The detachable housing design makes cleaning foreign matter easier, reducing maintenance time and workload. Attached Figure Description

[0024] Figure 1 This is a front view structural diagram of the present utility model;

[0025] Figure 2 This is a top view of the structure of this utility model;

[0026] Figure 3 This is a schematic diagram of the left-side structure of this utility model;

[0027] Figure 4 This is a front view structural diagram of the present invention with an oil tank;

[0028] Figure 5 This is a top view of the structure of the present invention with an oil tank;

[0029] Figure 6 This is a schematic diagram of the left-side structure of the present invention with an oil tank.

[0030] In the diagram: 1. Frame; 2. Roller; 3. Standard filter; 4. First precision filter; 5. Second precision filter; 6. Oil pump motor; 7. Oil pipe; 8. Connector; 9. Hydraulic gauge; 10. Braking structure; 11. Mounting base; 12. Positioning structure; 13. Control switch. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] See Figures 1-6 An oil filtration device, through a collaborative design of "mobile frame 1 + three-stage filtration + closed-loop circulation," achieves comprehensive oil purification, flexible operation, and convenient maintenance. The core solution is as follows: a lightweight alloy frame 1 serves as the basic load-bearing structure, bottom rollers 2 enable flexible movement of the device, a general-grade filter 3, a first-stage precision filter 4, and a second-stage precision filter 5 are connected in series to form a graded filtration system from coarse to fine, an oil pump motor 6 drives the oil to circulate in a closed loop, a hydraulic gauge 9 monitors the filtration pressure in real time, and a control switch 13 allows for convenient start and stop of the device. All components are precisely coordinated through bolt fixing, sealed connection, and quick plug-in / plug-out methods, solving the problems of limited application scenarios, single-stage filtration, and difficulty in movement of traditional filtration equipment. It is suitable for comprehensive filtration and purification of oil in tanks in scenarios such as factories, repair workshops, and laboratories.

[0033] First, refer to Figure 1 In this embodiment, the frame 1 is a frame structure, welded from lightweight alloy material, which is lightweight and has good rigidity. The surface is anodized for rust prevention. Four rollers 2 are symmetrically fixed at the four corners of the bottom of the frame 1 by bolts. The rollers 2 have built-in deep groove ball bearings, which can rotate flexibly and facilitate the movement of the equipment in workshops, laboratories and other places.

[0034] Each roller 2 is equipped with a braking structure 10 (foot-operated brake pad). When braking, the brake pad is pressed, and the roller 2 is locked in place by contacting the friction pad with the hub, ensuring stable placement of the equipment during operation (no sliding displacement). Multiple mounting seats 11 (cut from steel plates) are welded to the top of the frame 1. The mounting seats 11 are provided with positioning pin holes and bolt holes for fixing the ordinary filter 3, the first precision filter 4, the second precision filter 5, and the oil pump motor 6. The positioning pin holes ensure that the axes of each component are aligned after installation, avoiding uneven stress when connecting the oil pipe 7.

[0035] Then, refer to Figure 2In this embodiment, the filter assembly is the core of oil purification and consists of three-stage filters with increasing precision. The ordinary filter 3 is fixedly installed on the front mounting base 11 of the frame 1. The housing consists of an upper housing and a lower housing (both made of cast iron with rust-proof paint on the inner wall). The upper housing and the lower housing are detachably connected by bolts evenly distributed around the circumference. A rubber sealing ring (nitrile material) is added to the connection to seal against leakage. The internal filter element is made of metal wire mesh with a coarse filtration precision, used to intercept large particulate foreign objects in the oil. The edge of the filter element is fixed to the inner wall of the housing by a buckle for easy disassembly and replacement.

[0036] The first precision filter 4 is fixedly installed in the mounting base 11 in the middle of the frame 1. Its structure is the same as that of the ordinary filter 3 (removable housing + sealing ring). The internal filter element is made of glass fiber and has a medium filtration accuracy (higher than that of the ordinary filter 3). It is used to intercept medium-sized particulate matter. The surface of the filter element is folded into a corrugated shape to increase the filtration area, improve the dirt holding capacity, and extend the cleaning cycle.

[0037] The second precision filter 5 is fixedly installed on the rear mounting base 11 of the frame 1. The housing material and connection method are the same as the first two filters. The internal filter element is made of polytetrafluoroethylene and the filtration accuracy is fine (higher than the first precision filter 4). It is used to intercept small particulate foreign objects. The filter element adopts a folded structure and, together with the internal guide plate of the housing, makes the oil flow evenly across the surface of the filter element to avoid local blockage.

[0038] The three-stage filters are connected in series via oil pipe 7. The oil first passes through the ordinary filter 3 to remove large particles, then through the first precision filter 4 to intercept medium particles, and finally through the second precision filter 5 to purify tiny particles. The filtration accuracy is improved step by step, and the final oil cleanliness can reach NAS7 level or above, completely removing all kinds of foreign matter deposited in the oil tank.

[0039] Secondly, see Figure 4 In this embodiment, the power and circulation components drive the oil to flow in a closed loop to achieve comprehensive filtration. The oil pump motor 6 is fixed to the mounting base 11 on the side of the frame 1 by bolts. It is an integrated structure of a three-phase asynchronous motor and a gear pump. The motor output shaft is connected to the gear pump input shaft through a coupling. Both the oil inlet and outlet of the gear pump are provided with flange interfaces. The motor housing is equipped with heat sinks (aluminum alloy material), and the bottom is connected to the mounting base 11 through a shock-absorbing pad (rubber material) to reduce operating vibration.

[0040] Oil pipe 7 is a high-pressure rubber hose with a diameter designed according to the flow rate. Both ends are fixed to quick-connect couplings 8 via a snap-fit ​​structure. Couplings 8 are sealed to the oil outlet of ordinary filter 3, the oil inlet and outlet of oil pump motor 6, the oil inlet and outlet of first precision filter 4, the oil inlet and outlet of first precision filter 4, the oil inlet and outlet of second precision filter 5, and the oil return port of the oil tank to ensure no oil leakage.

[0041] Oil pipe 7 is connected sequentially via connector 8 to oil tank outlet → ordinary filter 3 inlet → ordinary filter 3 outlet → oil pump motor 6 inlet → oil pump motor 6 outlet → first precision filter 4 inlet → first precision filter 4 outlet → second precision filter 5 inlet → second precision filter 5 outlet → oil tank return port, forming a complete closed loop, so that the oil in the oil tank can be completely circulated and filtered, avoiding local deposition of foreign matter residue.

[0042] See again Figure 4 In this embodiment, the monitoring and control component enables equipment operation status monitoring and convenient operation. The hydraulic gauge 9 is installed on the top of the upper housing of the ordinary filter 3, the first precision filter 4, and the second precision filter 5 through threaded interfaces. The interfaces are sealed with Teflon tape. The sensing end of the hydraulic gauge 9 extends into the filter (in direct contact with the oil) and displays the pressure value of the oil flowing through the filter in real time. When foreign matter accumulates inside the filter and causes the filter element to become clogged, the pressure value will exceed the preset threshold, prompting the operator to clean the filter element.

[0043] The control switch 13 is fixed to the side of the frame 1 with bolts (for easy operation height). It is a push-button switch with an indicator light and is electrically connected to the oil pump motor 6 via a cable (the cable is protected by a corrugated pipe). When the switch is pressed, the oil pump motor 6 starts (the green indicator light is on), and when it is pressed again, the motor stops (the indicator light is off). The color change of the indicator light intuitively shows the working status of the motor and avoids misoperation.

[0044] In addition, see Figure 6 In this embodiment, the oil pump motor 6 drives the oil from the oil tank into the ordinary filter 3, and after three-stage filtration, it returns to the oil tank. The series design of the power and filter components ensures that the oil continuously circulates in a closed loop, achieving comprehensive purification of the oil in the oil tank. The precision of the three-stage filter increases progressively, avoiding the blockage of the coarse filter element by small particles and extending the overall cleaning cycle.

[0045] The rollers 2 at the bottom of the frame 1 enable flexible movement of the equipment and can easily connect to oil tanks in different positions. The braking structure 10 locks the rollers 2 when the equipment is working. Together with the positioning structure 12 of the mounting base 11, it ensures that the relative position of the filter and the oil pump motor 6 is stable, and the oil pipe 7 connection has no additional stress, thus avoiding leakage.

[0046] The hydraulic gauge 9 monitors the pressure of each filter in real time and prompts for cleaning when the pressure is abnormal. The removable housing design of the filter makes cleaning easy. Simply remove the bolts to open the housing and take out the filter element for cleaning or replacement, reducing maintenance difficulty.

[0047] In addition, see Figure 4 In this embodiment, the hydraulic oil in the factory hydraulic oil tank is filtered.

[0048] The hydraulic oil tank has a capacity of 500L. If the oil contains metal shavings, dust and other foreign matter, it needs to be purified to NAS7 level. The equipment needs to be moved to multiple oil tanks for filtration. The bottom rollers 2 of the equipment frame 1 are braked and locked. The three-stage filter and the oil pump motor 6 are positioned and fixed by the mounting base 11. The oil pipe 7 is connected to form a closed loop. The hydraulic gauge 9 is installed in place.

[0049] The ordinary grade filter 3 has a 10μm metal wire mesh, the first precision grade has a 5μm glass fiber, and the second precision grade has a 1μm polytetrafluoroethylene. Start the oil pump motor 6, and the oil will circulate at a flow rate of 60L / h. After 3 hours, the entire oil tank will be filtered (circulated 3 times).

[0050] The number of particles larger than 10μm in the oil was reduced to 8 per mL, particles larger than 5μm to 20 per mL, and particles larger than 1μm to 100 per mL, meeting the NAS 7 standard. During the filtration process, the pressure of hydraulic gauge 9 on the ordinary filter 3 increased from 0.2MPa to 0.4MPa (within the limit), indicating that a large number of large particles were intercepted. The pressure of the other two stages remained stable, and the filter elements were in good condition. After completion, the equipment was moved to the next oil tank, and the brake was released for movement. The entire process can be operated by a single person without the need for additional tools.

[0051] After running for 10 hours, the pressure of the ordinary filter 3 rose to 0.7MPa (exceeding the standard). After stopping the machine, the six bolts were removed to open the housing, the metal debris on the filter element was cleaned, and after reassembly, the pressure returned to 0.2MPa. The maintenance took 10 minutes.

[0052] Finally, see Figure 4 In this embodiment, the ordinary filter 3, the first precision filter 4, and the second precision filter 5 are made of 304 stainless steel, which improves corrosion resistance and is suitable for filtration scenarios containing water or corrosive oil. The service life is extended to three times that of the original cast iron shell. The outer layer of the oil pipe 7 is made of polyurethane material, which enhances wear resistance and is suitable for dragging scenarios on factory floors.

[0053] Working principle:

[0054] When using this oil filtration equipment, first push the frame 1 to move the equipment next to the oil tank to be filtered, then step on the roller 2 brake structure 10 to lock the equipment, ensuring stable installation (calibrate by using the level bubble on the frame 1, then connect the oil pipe 7 sequentially through the quick-connect couplings 8: oil tank outlet → ordinary filter 3 inlet, ordinary filter 3 outlet → oil pump motor 6 inlet, oil pump motor 6 outlet → first precision filter 4 inlet, first precision filter 4 outlet → second precision filter 5 inlet, second precision filter 5 outlet → oil tank return port, ensuring that each coupling 8 is properly engaged (you will hear a "click"), without any looseness or leakage).

[0055] Press control switch 13, the green indicator light will illuminate, and the oil pump motor 6 will start, driving the oil to flow along a closed loop: the oil in the tank first enters the ordinary filter 3 to intercept large particulate matter, then flows into the first precision filter 4 to remove medium-sized particles, and finally passes through the second precision filter 5 to purify tiny particles. The clean oil returns to the tank. Observe the pressure values ​​of the three hydraulic gauges 9. The initial pressure should be ≤0.3MPa. As filtration proceeds, if the pressure value of a certain filter exceeds 0.6MPa, it indicates that the filter element is clogged and the machine needs to be stopped for cleaning.

[0056] After stopping the machine, turn off the control switch 13, disconnect the oil pipe 7 connector 8 (press the connector 8 to release the clip), remove the housing bolts of the corresponding filter, take out the filter element and clean out foreign objects (or replace with a new filter element), and reassemble to continue filtering.

[0057] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An oil filtration device, characterized in that, include: Rack (1); Rollers (2) are provided at the bottom of the frame (1) to enable the overall movement of the equipment; A general-purpose filter (3) is fixedly installed on the frame (1); The first precision filter (4) is fixedly installed on the frame (1); The second precision filter (5) is fixedly installed on the frame (1); Oil pump motor (6), the oil pump motor (6) is fixedly installed on the frame (1); The oil pipe (7) is connected in series via a connector (8) to the oil tank outlet, the inlet of the ordinary filter (3), the outlet of the ordinary filter (3) and the inlet of the oil pump motor (6), the outlet of the oil pump motor (6) and the inlet of the first precision filter (4), the outlet of the first precision filter (4) and the inlet of the second precision filter (5), and the outlet of the second precision filter (5) and the oil tank return port, forming a closed filtration circuit; and Hydraulic gauge (9) is installed on the ordinary filter (3), the first precision filter (4) and the second precision filter (5) respectively, and is used to monitor the pressure changes inside the corresponding filters in real time.

2. The oil filtration equipment according to claim 1, characterized in that, There are four rollers (2), which are symmetrically distributed at the four corners of the bottom of the frame (1). Each roller (2) is equipped with a braking structure (10), which can lock the rotation of the roller (2) when the equipment is working.

3. The oil filtration equipment according to claim 2, characterized in that, The ordinary filter (3), the first precision filter (4), and the second precision filter (5) are all detachable structures. The ordinary filter (3), the first precision filter (4), and the second precision filter (5) are all composed of an upper shell and a lower shell. The upper shell and the lower shell are detachably connected by bolts evenly distributed in the circumference. After disassembly, the foreign matter accumulated inside can be directly cleaned.

4. The oil filtration equipment according to claim 3, characterized in that, The ordinary filter (3) is used to filter large particulate foreign matter in the oil. The internal filter element of the ordinary filter (3) has a coarse filtration accuracy. The first precision filter (4) is used to filter medium particulate foreign matter in the oil. The internal filter element of the first precision filter (4) has a medium filtration accuracy and a higher filtration accuracy than the ordinary filter (3). The second precision filter (5) is used to filter small particulate foreign matter in the oil. The internal filter element of the second precision filter (5) has a fine filtration accuracy and a higher filtration accuracy than the first precision filter (4).

5. The oil filtration device according to claim 4, characterized in that, The connector (8) is a quick-plug connector (8). Both ends of the oil pipe (7) are fixedly connected to the connector (8) through a snap-fit ​​structure. The interfaces of the connector (8) with the ordinary filter (3), the first precision filter (4), the second precision filter (5) and the oil pump motor (6) are all sealed connections.

6. The oil filtration device according to claim 5, characterized in that, The hydraulic gauge (9) is connected to the housing of the corresponding filter through a threaded interface. The sensing end of the hydraulic gauge (9) extends into the filter and can directly detect the pressure value of the oil flowing through the filter. When the pressure value exceeds the preset threshold, it indicates that foreign objects inside the filter need to be cleaned.

7. The oil filtration device according to claim 6, characterized in that, The frame (1) is made of lightweight alloy material. The frame (1) is provided with mounting base (11) for fixing the ordinary filter (3), the first precision filter (4), the second precision filter (5) and the oil pump motor (6). The mounting base (11) is provided with positioning structure (12) to ensure that the position of each component is stable after installation.

8. The oil filtration device according to claim 7, characterized in that, It also includes a control switch (13), which is mounted on the frame (1) and electrically connected to the oil pump motor (6) for controlling the start and stop of the oil pump motor (6). The control switch (13) is equipped with an indicator light to display the working status of the oil pump motor (6).

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