A multipurpose by-pass valve structure oil filter assembly

Abstract

A multi-purpose bypass valve structure oil filter assembly belongs to the field of fluid filtration and safety assurance technology. The oil filter housing has an oil outlet at the upper end, with two annular protrusions on the outer wall of the outlet. An O-ring is fitted onto the outer wall of the outlet. The oil filter housing has an oil inlet at the lower end, and filter holes are opened on both sides of the housing. A steel filter screen is fixed inside each filter hole, and each steel filter screen is positioned opposite a bypass valve assembly on the same side. Each bypass valve assembly is fixed inside the oil filter housing. The peripheral wall of the filter layer is sealed and fixedly connected to the inner wall of the oil filter housing, dividing the interior of the oil filter housing into an inlet chamber and an outlet chamber. This invention precisely solves the problems of existing oil filters without bypass valves, such as clogging and oil cut-off, easy wear during cold starts, and insufficient versatility of oil filters with bypass valves. Through structural design that enables emergency bypass temporary oil supply, universal adaptability to multiple devices, reliable sealing, and convenient maintenance, it achieves uninterrupted flow during clogging and no jamming during cold starts, meeting the safe oil supply needs of multiple scenarios and systems, significantly improving practicality and versatility.

Description

Technical Field

[0001] This invention belongs to the field of fluid filtration and safety assurance technology, specifically a multi-purpose bypass valve structure oil filter assembly. Background Technology

[0002] Currently, oil filters on the market are mainly divided into two categories. The first type is the conventional oil filter without a bypass valve, which is also the most widely used structure. It mainly consists of a housing, filter element, and seals. It lacks a bypass structure and emergency oil supply channel, and the oil must be forced through the filter element to flow out. This type of oil filter has a core defect: once the filter element becomes clogged, the oil supply will be immediately interrupted. The lack of an emergency oil supply channel can easily cause equipment to seize up or shut down. At the same time, during cold starts at low temperatures, the viscosity of the oil leads to high flow resistance and insufficient oil supply flow, making the equipment prone to dry running and severe wear during startup. The second type is the oil filter with a bypass valve, which is mostly used in specialized or high-end equipment. Its bypass valve is usually built into the upper end cap or base of the filter element. Generally, the bypass valve structure is set in the central hole of the cylindrical oil filter. It has the problem of limited adaptability and insufficient versatility. In response to the shortcomings of existing oil filters without bypass valves, such as easy oil cut-off and easy wear, as well as the poor versatility of oil filters with bypass valves, there is an urgent need for a multi-purpose oil filter assembly with a bypass valve structure that is universal for multiple scenarios, does not interrupt flow when blocked, and does not jam when cold starting. Summary of the Invention

[0003] To address the problems existing in the background art, the present invention provides a multi-purpose bypass valve structure oil filter assembly, including an oil filter housing, an oil outlet, an O-ring, an oil inlet, a filter layer, two steel filter screens, and two bypass valve assemblies;

[0004] An oil outlet is provided on one side of the upper end of the oil filter housing. The outer wall of the oil outlet has two annular protrusions, and an O-ring is provided between the two annular protrusions. The O-ring is fitted onto the outer wall of the oil outlet. An oil inlet is provided on the other side of the lower end of the oil filter housing. Oil filter holes are provided on both opposite side walls of the oil filter housing. A steel filter screen is fixed in each oil filter hole. Each steel filter screen is arranged opposite to a bypass valve assembly on the same side. Each bypass valve assembly is fixed inside the oil filter housing. Two bypass valve assemblies are arranged symmetrically. A filter layer is provided below the two bypass valve assemblies. The peripheral wall of the filter layer is sealed and fixedly connected to the inner wall of the oil filter housing. The filter layer divides the interior of the oil filter housing into a lower oil inlet chamber and an upper oil outlet chamber.

[0005] Each of the bypass valve assemblies includes a bypass valve housing, a valve core head, a valve core tail, a spring, and multiple oil holes;

[0006] The bypass valve housing is fixed inside the oil filter housing and located above the filter layer. The bypass valve housing has two chambers, a central partition, and a sliding hole in the center of the partition. Multiple oil holes are evenly distributed around the sliding hole on the partition. The first chamber and the second chamber are connected through the sliding hole and the multiple oil holes. The first chamber is connected to the oil outlet chamber of the oil filter housing. A bypass hole is provided at one end of the second chamber. The bypass hole is coaxially opposite to the corresponding steel filter screen. The bypass hole is blocked at one end of the valve core head. The other end of the valve core head is fixedly connected to one end of the valve core tail. The valve core tail is slidably positioned in the sliding hole. A stop is provided at the other end of the valve core tail. A spring is fitted on the valve core tail. One end of the spring abuts against the valve core head, and the other end of the spring abuts against the side of the central partition facing the second chamber.

[0007] The stiffness coefficient K of the spring is 0.184~0.263 N / mm.

[0008] All metal parts of the bypass valve assembly are made of corrosion-resistant stainless steel or have been treated with nickel or zinc plating for corrosion protection.

[0009] Compared with the prior art, the beneficial effects of the present invention are:

[0010] 1. Addressing the core shortcomings of conventional oil filters without bypass valves, such as oil supply interruption upon filter element blockage and lack of emergency oil supply channels, this product incorporates a built-in dual-sided symmetrical bypass valve assembly. When the filter layer is blocked or the oil becomes viscous at low temperatures, the emergency bypass channel can be automatically opened to provide temporary oil supply, preventing equipment from seizing or shutting down due to oil supply interruption and ensuring the basic operational safety of the equipment.

[0011] 2. To address the issues of viscous oil, high flow resistance, and severe dry wear of equipment during low-temperature cold starts, the bypass valve can open promptly based on the oil supply pressure difference, quickly establishing an oil supply path, effectively reducing dry wear during cold starts, and preventing equipment startup jamming.

[0012] 3. Overcoming the limitations of existing oil filters with bypass valves that are only suitable for a single application scenario and have poor versatility, it can be used in a variety of equipment such as engineering machinery, vehicles, ships, general aviation, low-altitude drones, and generator sets. It is also compatible with various lubrication, fuel, and hydraulic systems, making it more widely applicable.

[0013] 4. The oil outlet adopts a sealing structure with a double-ring convex edge limiting O-ring, which ensures stable sealing and improves the connection and sealing between the assembly and the valve body, effectively preventing oil leakage.

[0014] 5. Adopting an integrated structural design, maintenance can be completed by replacing the entire filter layer without disassembly after filter layer failure, simplifying the equipment maintenance process.

[0015] In summary, this invention precisely solves the problems of existing oil filters without bypass valves, such as oil filter blockage and oil cut-off, easy wear during cold starts, and insufficient versatility of oil filters with bypass valves. Through the structural design of emergency bypass temporary oil supply, universal compatibility with multiple devices, reliable sealing, and convenient maintenance, it achieves uninterrupted flow even when blocked and no jamming during cold starts. It can meet the safe oil supply needs of multiple scenarios and systems, and its practicality and versatility are significantly improved. Attached Figure Description

[0016] Figure 1 This is a front view of the present invention;

[0017] Figure 2 yes Figure 1 A magnified view of part A;

[0018] Figure 3 This is a schematic diagram showing the connection relationship between the valve core head, valve core tail, and spring of the present invention. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the invention, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0020] This embodiment describes a multi-purpose bypass valve structure oil filter assembly, including an oil filter housing 1, an oil outlet 2, an O-ring 3, an oil inlet 4, a filter layer 7, two steel filter screens 5, and two bypass valve assemblies 6;

[0021] The oil filter housing 1 has an oil outlet 2 on one side of its upper end. The outer wall of the oil outlet 2 has two annular protrusions, and an O-ring 3 is provided between the two annular protrusions. The O-ring 3 is fitted onto the outer wall of the oil outlet 2. The oil filter housing 1 has an oil inlet 4 on the other side of its lower end. The oil filter housing 1 has filter holes on both opposite side walls. A steel filter screen 5 is fixed in each filter hole. Each steel filter screen 5 is arranged opposite to a bypass valve assembly 6 on the same side. Each bypass valve assembly 6 is fixed inside the oil filter housing 1. The two bypass valve assemblies 6 are arranged symmetrically. A filter layer 7 is provided below the two bypass valve assemblies 6. The peripheral wall of the filter layer 7 is sealed and fixedly connected to the inner wall of the oil filter housing 1. The filter layer 7 divides the interior of the oil filter housing 1 into a lower oil inlet chamber and an upper oil outlet chamber.

[0022] Each of the bypass valve assemblies 6 includes a bypass valve housing 601, a valve core head 603, a valve core tail 604, a spring 605, and a plurality of oil holes 602.

[0023] The bypass valve housing 601 is fixed inside the oil filter housing 1 and located above the filter layer 7. The bypass valve housing 601 has a first cavity and a second cavity, which are separated by a central partition. A sliding hole is opened in the center of the partition, and multiple oil holes 602 are evenly distributed around the sliding hole on the partition. The first cavity and the second cavity are connected through the sliding hole and the multiple oil holes 602. The first cavity is connected to the oil outlet cavity of the oil filter housing 1. A bypass hole is opened at one end of the second cavity. The bypass hole is coaxially opposite to the corresponding steel filter screen 5. The bypass hole is blocked by one end of the valve core head 603. The other end of the valve core head 603 is fixedly connected to one end of the valve core tail 604. The valve core tail 604 is limited and slidably arranged in the sliding hole. The other end of the valve core tail 604 is provided with a stop. The spring 605 is fitted on the valve core tail 604. One end of the spring 605 abuts against the valve core head 603, and the other end of the spring 605 abuts against the side of the central partition facing the second cavity.

[0024] The stiffness coefficient K of the spring 605 is 0.184~0.263 N / mm.

[0025] All metal parts of the bypass valve assembly 6 are made of corrosion-resistant stainless steel or have been treated with nickel or zinc plating for corrosion protection.

[0026] This multi-purpose bypass valve structure oil filter assembly is installed inside the equipment oil pan and immersed in oil. The oil outlet 2 is connected to the valve body, which integrates an oil pump, flow monitoring, and pressure monitoring functions. The valve body uses the suction force generated by the oil pump to achieve oil suction and oil distribution to various systems. The oil filter assembly automatically switches between normal filtration and emergency bypass oil supply based on the pressure difference formed by the filter layer resistance and the oil pump suction. Under normal conditions, the spring 605 is in a pre-compressed state, and the elastic force generated by the pre-compression pushes the valve core head 603 towards the corresponding bypass hole, tightly sealing the bypass hole in cavity two of the bypass valve housing 601. The stop at the end of the valve core tail 604 forms a sliding limit on the valve core, preventing the valve core from dislodging from the sliding hole. During normal operation, the oil flows under the suction force of the oil pump... Oil filter housing 1 (the bottom of oil filter housing 1 can be equipped with a mounting flange or threaded interface to adapt to various installation scenarios such as oil pan, oil tank, oil circuit, etc.) enters through the oil inlet 4 at the lower end of the oil filter housing 1 and passes through the filter layer 7 (the filter layer 7 can be made of glass fiber composite filter material with a filtration accuracy of 10μm and a dirt holding capacity of not less than 15g) to complete fine filtration. The filtered oil is then drawn into the valve body through the oil outlet 2 and distributed by the valve body to various oil-using systems. The O-ring 3 (the O-ring 3 can be made of nitrile rubber with a working temperature range of -40℃ to 120℃, suitable for lubricating oil, hydraulic oil and diesel medium) between the two annular protrusions on the outer wall of the oil outlet 2 ensures the sealing reliability of the connection between the oil outlet 2 and the valve body. The valve body monitors the oil flow and pressure parameters in real time.

[0027] When the filter layer 7 becomes clogged due to impurities or when the low-temperature oil viscosity is too high, causing flow obstruction, the pressure difference between the inlet and outlet chambers will automatically and continuously increase. When the pressure difference between the inlet and outlet chambers reaches 35~50kPa (corresponding to the pre-compression force of spring 605 stiffness coefficient 0.184~0.263N / mm), the pressure difference force overcomes the pre-compression elastic force of spring 605, pushing the valve core head 603 to move in one direction of the chamber. Spring 605 is further compressed, and valve core tail 604 slides along the sliding hole limit, and the bypass hole opens accordingly. The oil in the oil pan passes through the steel filter screen 5 in the oil filter housing 1 on both sides (the steel filter screen 5 can be made of 100-mesh stainless steel woven mesh, which can filter large particles with a particle size greater than 150μm and prevent them from entering). After filtration (the bypass channel scratches the downstream oil pump and bearing), the oil enters the second cavity of the bypass valve housing 601 through the bypass hole, and then flows into the first cavity through the circumferentially distributed oil holes 602 and merges into the oil outlet 2. Temporary emergency oil supply is achieved by relying on the bypass valve assembly 6 symmetrically arranged on both sides, ensuring that the vehicle can drive to the maintenance site and the aircraft can land safely. This oil filter assembly adopts an integral structure. After the filter layer is blocked, it is not disassembled and repaired separately. Maintenance is completed by replacing the entire oil filter assembly. After replacing the new assembly, the filter layer flow returns to normal, the valve body monitors the flow rate to the standard value, the pressure difference between the inside and outside of the filter layer falls below the bypass valve opening threshold, the spring 605 resets and pushes the valve core head 603 to re-seal the bypass hole, and the oil filter assembly returns to the normal fine filtration working state.

[0028] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of the equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A multi-purpose bypass valve structure oil filter assembly, characterized in that: It includes an oil filter housing (1), an oil outlet (2), an O-ring (3), an oil inlet (4), a filter layer (7), two steel filter screens (5), and two bypass valve assemblies (6); The oil filter housing (1) has an oil outlet (2) on one side of its upper end. The outer wall of the oil outlet (2) has two annular protrusions, and an O-ring (3) is provided between the two annular protrusions. The O-ring (3) is fitted on the outer wall of the oil outlet (2). The other side of the lower end of the oil filter housing (1) has an oil inlet (4). The oil filter housing (1) has oil filter holes on both sides of its opposite side. Each oil filter hole has a steel filter screen (5) fixed inside it. Each steel filter screen (5) is arranged opposite to the bypass valve assembly (6) on the same side. Each bypass valve assembly (6) is fixed inside the oil filter housing (1). The two bypass valve assemblies (6) are arranged symmetrically. A filter layer (7) is provided below the two bypass valve assemblies (6). The peripheral wall of the filter layer (7) is sealed and fixedly connected to the inner wall of the oil filter housing (1). The filter layer (7) divides the interior of the oil filter housing (1) into the lower oil inlet chamber and the upper oil outlet chamber.

2. The multi-purpose bypass valve structure oil filter assembly according to claim 1, characterized in that: Each of the bypass valve assemblies (6) includes a bypass valve housing (601), a valve head (603), a valve tail (604), a spring (605), and a plurality of oil holes (602). The bypass valve housing (601) is fixed inside the oil filter housing (1) and located above the filter layer (7). The bypass valve housing (601) has a first cavity and a second cavity, which are separated by a central partition. A sliding hole is provided in the center of the partition, and multiple oil holes (602) are evenly distributed around the sliding hole on the partition. The first cavity and the second cavity are connected through the sliding hole and the multiple oil holes (602). The first cavity is connected to the oil outlet cavity of the oil filter housing (1). A bypass hole is provided at one end of the second cavity, and the bypass hole is connected to the corresponding steel filter screen ( 5) The valve core head (603) is coaxially arranged opposite each other. The bypass hole is blocked by one end of the valve core head (603). The other end of the valve core head (603) is fixedly connected to one end of the valve core tail (604). The valve core tail (604) is limited and slidably arranged in the sliding hole. The other end of the valve core tail (604) is provided with a stop. The spring (605) is fitted on the valve core tail (604). One end of the spring (605) abuts against the valve core head (603), and the other end of the spring (605) abuts against the side of the central partition facing the cavity two.

3. The multi-purpose bypass valve structure oil filter assembly according to claim 2, characterized in that: The stiffness coefficient K of the spring (605) is 0.184~0.263 N / mm.

4. The multi-purpose bypass valve structure oil filter assembly according to claim 2, characterized in that: All metal parts of the bypass valve assembly (6) are made of corrosion-resistant stainless steel or have been treated with nickel or zinc plating for corrosion protection.

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