Filter with pressure early warning and pressure relief functions

Abstract

The utility model belongs to the technical field of oil filtration, and relates to a filter with pressure early warning and pressure relief functions. Comprising a shifting piece assembly, a piston assembly, a first spring, a first sealing ring, an upper shell, a valve assembly, a second spring, a filtering element, a lower shell, a second sealing ring, a mechanical indicator and an electric indicator shell. A multiple pressure early warning device is additionally arranged on the oil filter, so that a mechanical warning signal is sent out by the oil filter before and after the pressure difference of a filtering element reaches a certain value to prompt that the through flow of the oil filter is reduced, and the filtering element needs to be maintained in time. If the filter element is not maintained in time and the front and back pressure difference of the filter element is continuously increased to a certain value, an electric early warning is given out and the bypass valve relieves the pressure, so that the use hidden dangers of downstream cutoff, pressure rise and the like of the system caused by blockage of the filter element are avoided, and the use reliability of the system is improved.

Description

Technical Field

[0001] This utility model belongs to the field of oil filtration technology and relates to a filter with pressure warning and pressure relief functions. Background Technology

[0002] After a certain period of use, as the filter element intercepts more contaminants, the pressure difference across the filter element increases, and the filter flow rate decreases. To avoid potential system malfunctions due to reduced oil filter flow rate causing downstream flow interruption or increased pressure, personnel should be notified promptly to maintain the filter element. Utility Model Content

[0003] Utility Model Purpose

[0004] Adding multiple pressure warning devices to the oil filter ensures that when the pressure difference across the filter element reaches a certain value, a mechanical alarm signal is first issued, indicating a decrease in the oil filter's flow rate and prompting timely maintenance of the filter element. If the filter element is not maintained in time, and the pressure difference across the filter element continues to increase to a certain value, an electrical warning is issued, and the bypass valve releases pressure to prevent potential problems such as downstream flow interruption and pressure rise caused by filter element blockage.

[0005] Technical solution

[0006] A filter with pressure warning and pressure relief functions includes a lever assembly, a piston assembly, a first spring, a first sealing ring, an upper housing, a valve assembly, a second spring, a filter element, a lower housing, a second sealing ring, a mechanical indicator, and an electrical indicator housing. One end of the first spring is fixed inside the lower end of the pressure-sensing chamber of the electrical indicator housing, and the other end of the first spring is connected to one end of the piston assembly. The electrical indicator housing includes a pressure-sensing chamber and an indicating chamber. The other end of the piston assembly is connected to the upper end of the pressure-sensing chamber of the electrical indicator housing. The piston assembly and the lever assembly are attracted or disconnected by a magnet. The paddle assembly, piston assembly, and first spring constitute an electric warning mechanism, which is threadedly connected to the upper housing. The upper housing is threadedly connected to the fixed end of the valve assembly and sealed with a first sealing ring. The moving end of the valve assembly is provided with a second spring and fixed by a snap ring. The lower housing is threadedly connected to the upper housing. The mechanical indicator is threadedly installed on one side of the lower housing. The filter element is disposed between the mechanical indicator and the valve assembly and sealed with a second sealing ring.

[0007] Furthermore, the oil flows into the lower housing cavity through the filter inlet, is filtered by the filter element, and then flows out through the upper housing. When the pressure difference across the filter element reaches a certain value, a mechanical indicator issues a mechanical warning. If the filter element is not maintained in time, the pressure difference across the filter element continues to increase. After increasing to a certain value, the piston assembly moves downward against the force of the first spring, the spring inside the paddle assembly disengages from the magnet and connects the circuit, and the electrical warning mechanism issues an electrical warning signal. At the same time, the valve assembly opens, and the system oil flows out directly from the upper housing without being filtered by the filter element.

[0008] Furthermore, the first and second sealing rings are made of nitrile rubber 5080.

[0009] Furthermore, the first spring is made of stainless steel wire 3J1-0.8 and the second spring is made of stainless steel wire 3J1-1.5.

[0010] Furthermore, the filter element's screen material is MXW10, and the liner material is stainless steel mesh 0Cr18Ni9.

[0011] Furthermore, the process of the spring inside the paddle assembly disengaging from the magnet and connecting the circuit is as follows: the inner column magnet of the piston assembly moves downward, causing the magnetic rotator and the wire piece in the paddle assembly to rotate, and the wire piece connects to the wire post to connect the circuit.

[0012] Furthermore, regarding the transmission path and function of the electrical warning signal, when the paddle assembly connects to the electrical circuit, the electrical warning signal is transmitted to the flight control system through the plug and wires, reminding the filter device to open the pressure relief valve, allowing the oil to enter the downstream of the system directly without being filtered by the filter element.

[0013] The beneficial effects of this application are as follows:

[0014] Adding multiple pressure warning devices to the oil filter ensures that when the pressure difference across the filter element reaches a certain value, a mechanical alarm signal is first issued, indicating a decrease in the oil filter's flow rate and prompting timely maintenance of the filter element. If the filter element is not maintained in time, and the pressure difference across the filter element continues to increase to a certain value, an electrical warning is issued, and a bypass valve releases pressure. This prevents potential problems such as downstream flow interruption and pressure rise due to filter element blockage, thus improving system reliability. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of an embodiment of the present invention of a filter with pressure warning and pressure relief functions.

[0016] The components include: a paddle assembly 1, a piston assembly 2, a first spring 3, a first sealing ring 4, an upper housing 5, a valve assembly 6, a second spring 7, a filter element 8, a lower housing 9, a second sealing ring 10, a mechanical indicator 11, and an electrical indicator housing 12. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be described in more detail below with reference to the embodiments of this utility model. In the examples, the same or similar reference numerals denote the same or similar components or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this utility model. The embodiments described below with reference to the embodiments are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. The embodiments of this utility model will be described in detail below with reference to their specific implementation.

[0018] A filter with pressure warning and pressure relief functions includes a lever assembly 1, a piston assembly 2, a first spring 3, a first sealing ring 4, an upper housing 5, a valve assembly 6, a second spring 7, a filter element 8, a lower housing 9, a second sealing ring 10, and a mechanical indicator 11; an electrical indicator housing 12, one end of the first spring 3 is fixed inside the lower end of the pressure-sensing chamber of the electrical indicator housing 12, and the other end of the first spring 3 is connected to one end of the piston assembly 2. The electrical indicator housing 12 includes a pressure-sensing chamber and an indicator chamber. The other end of the piston assembly 2 is connected to the upper end of the pressure-sensing chamber of the electrical indicator housing 12. The piston assembly 2 and the lever assembly 1 are attracted or disconnected by a magnet. 1. The indicator housing 12 is connected to the indicator cavity by a thread. The paddle assembly 1, piston assembly 2, and first spring 3 constitute an electric warning mechanism. The electric warning mechanism is connected to the upper housing 5 by a thread. The upper housing 5 is connected to the fixed end of the valve assembly 6 by a thread and sealed by a first sealing ring 4. The moving end of the valve assembly 6 is provided with a second spring 7 and is fixed by a snap ring. The lower housing 9 is connected to the upper housing 5 by a thread. The mechanical indicator 11 is installed on one side of the lower housing 9 by a thread. The filter element 8 is disposed between the mechanical indicator 11 and the valve assembly 6 and sealed by the second sealing ring 10.

[0019] In one embodiment of this utility model, the oil flows into the inner cavity of the lower housing 9 through the inlet of the filter device, is filtered by the filter element 8, and then flows out through the upper housing 5. When the pressure difference across the filter element 8 reaches a certain value, the mechanical indicator 11 issues a mechanical warning. If the filter element 8 is not maintained in time, the pressure difference across the filter element 8 continues to increase. After increasing to a certain value, the piston assembly 2 moves downward against the force of the first spring 3, the spring inside the paddle assembly 1 disengages from the magnet and connects the circuit, and the electrical warning mechanism issues an electrical warning signal. At the same time, the valve assembly 6 opens, and the system oil flows out directly from the upper housing 5 without being filtered by the filter element 8.

[0020] In one embodiment of this utility model, the first sealing ring 4 and the second sealing ring 10 are made of nitrile rubber 5080.

[0021] In one embodiment of this utility model, the first spring 3 is made of stainless steel wire 3J1-0.8 and the second spring 7 is made of stainless steel wire 3J1-1.5.

[0022] In one embodiment of this utility model, the filter element 8 has an MXW10 filter screen material and a stainless steel mesh 0Cr18Ni9 (flat) liner material.

[0023] In one embodiment of this utility model, the spring piece inside the paddle assembly 1 disengages from the magnet and connects the circuit specifically as follows: the inner column magnet of the piston assembly 2 moves downward, driving the magnetic rotator and the wire piece in the paddle assembly to rotate, and the wire piece connects to the wire post to connect the circuit.

[0024] In one embodiment of this utility model, the transmission path and function of the electrical warning signal are as follows: when the paddle assembly connects to the electrical circuit, the electrical warning signal is transmitted to the flight control system through the plug and wires, reminding relevant personnel to open the pressure relief valve of the filter device, so that the oil can directly enter the downstream of the system without being filtered by the filter element.

[0025] Indicator 1 is fixed to housing 3 by screws, and bypass valve 4 is fixed to upper housing 3 by threads. When the pressure difference across filter element 7 reaches a certain value, piston assembly 2 moves downward against the force of first spring 3, and the built-in spring of pressure warning device disengages from the magnetic force to connect the circuit, issuing an electrical warning signal. At the same time, to prevent downstream pressure from rising, valve assembly 6 moves to the left against the force of second spring 7, allowing oil to enter the downstream of the system directly without being filtered by the filter element.

[0026] A pressure warning device is added to the oil filter to ensure that an electrical alarm signal is issued when the pressure difference across the filter element reaches a certain value, indicating a decrease in the oil filter flow rate and prompting timely maintenance of the filter element. A bypass valve is also added for pressure relief to prevent potential downstream pressure increases caused by filter element blockage, thus avoiding operational risks.

[0027] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless defined as herein. The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this invention. It should be understood that the above descriptions are merely specific embodiments of this invention and are not intended to limit this invention. Within the spirit and principles of this invention, any person skilled in the art may modify or alter the disclosed technical content to create equivalent embodiments applicable to other fields. However, any simple modifications, equivalent changes, alterations, modifications, equivalent substitutions, improvements, etc., made to the above embodiments based on the technical essence of this invention without departing from the content of the technical solution of this invention should be included within the protection scope of this invention.

Claims

1. A filter with pressure warning and pressure relief functions, characterized in that, The device includes a paddle assembly, a piston assembly, a first spring, a first sealing ring, an upper housing, a valve assembly, a second spring, a filter element, a lower housing, a second sealing ring, a mechanical indicator, and an electrical indicator housing. One end of the first spring is fixed inside the lower end of the pressure-sensing chamber of the electrical indicator housing, and the other end of the first spring is connected to one end of the piston assembly. The electrical indicator housing includes a pressure-sensing chamber and an indicating chamber. The other end of the piston assembly is connected to the upper end of the pressure-sensing chamber of the electrical indicator housing. The piston assembly and the paddle assembly are attracted or disconnected by a magnet. The paddle assembly is threadedly connected to the indicating chamber of the electrical indicator housing. The paddle assembly, piston assembly, and first spring constitute an electrical warning mechanism. The electrical warning mechanism is threadedly connected to the upper housing. The upper housing is threadedly connected to the fixed end of the valve assembly and sealed with a first sealing ring. The moving end of the valve assembly is provided with a second spring and fixed by a snap ring. The lower housing is threadedly connected to the upper housing. The mechanical indicator is threadedly installed on one side of the lower housing. The filter element is disposed between the mechanical indicator and the valve assembly and sealed with a second sealing ring.

2. The filter as claimed in claim 1, characterized in that, The first and second sealing rings are made of nitrile rubber 5080.

3. The filter as described in claim 1, characterized in that, The first spring is made of stainless steel wire 3J1-0.8, and the second spring is made of stainless steel wire 3J1-1.

5.

4. The filter as claimed in claim 1, characterized in that, The filter element's screen material is MXW10, and the lining material is stainless steel mesh 0Cr18Ni9.

5. The filter as claimed in claim 1, characterized in that, Specifically, the spring inside the paddle assembly disengages from the magnet and connects the circuit as follows: the inner column magnet of the piston assembly moves downward, causing the magnetic rotator and wire piece in the paddle assembly to rotate, and the wire piece connects to the wire post to connect the circuit.

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