High-precision filter element for hydraulic circulating system

Abstract

The utility model discloses a kind of high-precision filter elements of hydraulic circulating system, related technical field of hydraulic system is disclosed.The utility model includes main component and protection component, main component includes outer tube, oil inlet is fixed in one end of outer tube, support piece is fixed in outer tube inner chamber center, filter material is arranged in the outer periphery side of support piece, oil outlet is fixed in one end of support piece.The utility model is passed through the protection component of being set, when hydraulic oil enters outer tube, first contact with the anti-impact top plate of being opposite oil inlet, disperse oil impact force, flow to anti-impact outside plate, after the staggered arrangement of anti-impact outside plate, anti-impact inside plate further carries out oil flow and buffering, prevent the metal impurity in oil liquid from directly impacting filter material, solve the problem that high-precision filter elements of hydraulic circulating system are easily impacted by metal impurity in oil liquid and lead to damage and shortened life.

Description

Technical Field

[0001] This utility model belongs to the technical field of hydraulic systems, and in particular relates to a high-precision filter element for a hydraulic circulation system. Background Technology

[0002] High-precision filter elements for hydraulic circulation systems are core filtration components that ensure the stable operation of hydraulic systems. They are mainly used to intercept solid particles and colloidal impurities in hydraulic oil caused by equipment wear and external intrusion. Their filtration accuracy can typically reach the micron level, far exceeding the filtration capacity of ordinary filter elements. Through filter media with a specific structure, they can efficiently capture tiny impurities without affecting the normal flow of hydraulic oil, preventing impurities from entering the fitting gaps of key components such as hydraulic pumps, valve groups, and cylinders. This reduces component wear, prevents valve core jamming, lowers the probability of system failure, and delays the aging and deterioration of hydraulic oil, extending the service life of the oil and equipment.

[0003] However, it still has the following drawbacks in actual use: When the hydraulic pump suddenly starts or stops, the oil flow rate instantly rises from zero to the rated value (or drops sharply); when the directional valve or relief valve suddenly reverses or opens and closes, the oil pressure fluctuates instantaneously, directly affecting the filter media and end caps of the filter element. At the same time, there are large-sized hard impurities in the oil, and the high-speed oil flow will carry the impurities to impact the surface of the filter media. The filter media is the core of the filter element and is usually made of porous materials such as paper, chemical fiber, and metal mesh. Its tensile and impact strength is low, which easily damages the filter surface, resulting in a decrease in the filtration area and a premature increase in the filter element pressure differential, requiring frequent replacement (lifespan). (It is common for the lifespan to be shortened by more than 50%). Secondly, the impact of oil and impurities can easily cause deformation of the support frame and end cap, resulting in loss of support for the filter media and damage to the filter element. At the same time, existing high-precision filter elements, due to their high filtration accuracy and density, will significantly increase the flow resistance (i.e., pressure loss) of hydraulic oil. This means that when the system flow rate is large or the filter element is close to being blocked, the pressure loss may exceed the design threshold, resulting in insufficient oil intake of the hydraulic pump, sluggish operation of actuators (such as cylinders and motors), and even triggering the system pressure protection, interrupting normal operation. This can easily have a certain impact on the entire hydraulic system and lacks warning functions. Utility Model Content

[0004] The purpose of this invention is to provide a high-precision filter element for a hydraulic circulation system. By setting up protective components, it solves the problem that the high-precision filter element for a hydraulic circulation system is easily damaged and has a shortened lifespan due to rapid impact from metal impurities in the oil.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model is a high-precision filter element for a hydraulic circulation system, including a main component and a protective component. The main component includes an outer cylinder, with an oil inlet fixed through one end of the outer cylinder, a support fixed in the center of the inner cavity of the outer cylinder, filter material provided on the outer periphery of the support, and an oil outlet fixed through one end of the support, with the outer port of the oil outlet penetrating and protruding from the end wall of the outer cylinder. The cavity between the outer cylinder and the filter media is called the outer cavity. An anti-impact top plate is fixed inside the outer cavity, and the anti-impact top plate is positioned directly opposite the oil inlet. From the outside to the inside, the outer filter screen, the anti-impact outer side plate, and the anti-impact inner side plate are also fixed in the outer cavity.

[0006] Furthermore, the anti-impact top plate is tapered, and the concave surface of the anti-impact top plate is positioned directly opposite the oil inlet.

[0007] Furthermore, the outer filter is a strong magnetic mesh.

[0008] Furthermore, from the end view, the outer anti-impact plate and the inner anti-impact plate are respectively set in a V-shape and an inverted V-shape. Both the outer anti-impact plate and the inner anti-impact plate are arranged in a circular array with the support member as the center, and the outer anti-impact plate and the inner anti-impact plate are arranged alternately in sequence.

[0009] Furthermore, the anti-impact inner side plate is positioned close to the filter material.

[0010] Furthermore, a pressure sensor is also installed on the outer cylinder.

[0011] This utility model has the following beneficial effects: 1. This utility model, through its protective components, ensures that when hydraulic oil enters the outer cylinder, it first contacts the anti-impact top plate directly opposite the oil inlet. The concave concave anti-impact top plate buffers the oil, dispersing its impact force. After being buffered by the anti-impact top plate, the oil continues to flow into the outer cavity, then flows to the outer anti-impact outer plate. Subsequently, the oil passes through the inverted V-shaped anti-impact inner plates, which are arranged alternately with the outer anti-impact outer plates. The inner anti-impact inner plates further guide and buffer the oil, preventing metal impurities inside the oil from directly impacting the filter material. This solves the problem that high-precision filter elements in hydraulic circulation systems are easily damaged and have their lifespan shortened due to rapid impacts from metal impurities in the oil.

[0012] 2. With the protective components set up in this utility model, after the hydraulic oil enters the outer cylinder, it will first pass through the outer filter screen. The outer filter screen is a strong magnetic mesh that can adsorb metal impurities in the oil, perform preliminary filtration of the oil, reduce the filtration pressure of subsequent filter media, and complete the preliminary filtration of the oil. This solves the problem in the existing solution that large metal impurities directly impact the filter media, which can easily cause damage to the filter media and greatly reduce the service life of the filter media.

[0013] 3. This utility model, through the setting of protective components, has a pressure sensor installed on its outer cylinder, which can monitor the pressure changes of the hydraulic oil inside the outer cylinder in real time. When the pressure exceeds the set threshold, it can send an alarm signal to the hydraulic system or the operator to remind them to replace the filter element in time. This avoids the situation where the hydraulic pump cannot draw enough oil, the actuator moves slowly, or even the system pressure protection is triggered and the normal operation is interrupted due to filter element blockage. This solves the problem that there is no warning when the pressure is too high in the existing solution, and the filter element cannot be replaced in time, thus affecting the normal use of the equipment. Attached Figure Description

[0014] Figure 1 This is a structural schematic diagram of the overall appearance of this utility model; Figure 2 This is a structural schematic diagram of the cross-section of the outer cylinder of this utility model; Figure 3 This is a structural schematic diagram showing the cross-sectional views of the outer anti-impact plate and the inner anti-impact plate of this utility model; Figure 4 This is a schematic diagram of the structure of the support component and filter material of this utility model; Figure 5 This is a structural schematic diagram from the end view of the internal parts of this utility model.

[0015] Figure label: 1. Main body assembly; 11. Outer cylinder; 12. Oil inlet; 13. Support component; 14. Filter media; 15. Oil outlet; 2. Protective components; 21. Outer cavity; 22. Anti-impact top plate; 23. Outer filter screen; 24. Anti-impact outer side plate; 25. Anti-impact inner side plate; 26. Pressure sensor. Detailed Implementation

[0016] 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.

[0017] Please see Figure 1-5 As shown, this utility model is a high-precision filter element for a hydraulic circulation system, including a main component 1 and a protective component 2. The main component 1 includes an outer cylinder 11, with an oil inlet 12 fixedly connected to one end of the outer cylinder 11. A support member 13 is fixedly fixed to the center of the inner cavity of the outer cylinder 11, and filter material 14 is provided on the outer periphery of the support member 13. An oil outlet 15 is fixedly connected to one end of the support member 13, and the outer end of the oil outlet 15 extends through and protrudes from the end wall of the outer cylinder 11.

[0018] The outer cylinder 11 serves as the external support structure for the entire filter element, providing installation space and protection for internal components. It also forms an external cavity for hydraulic oil flow, ensuring that the oil flows along a predetermined path within the filter element and preventing leakage or unfiltered outflow. The inlet 12 is the channel for hydraulic oil to enter the filter element; oil from the hydraulic system enters through the inlet 12, providing a source for subsequent filtration. Its continuous and fixed design ensures stable and smooth entry of oil into the inner cavity of the outer cylinder 11. The support member 13 is located at the center of the inner cavity of the outer cylinder 11, primarily supporting the filter media 14 to prevent deformation or damage under hydraulic oil pressure, ensuring the filter media 14 maintains a stable filtration shape. Simultaneously, the support member 13... An internal channel is formed to facilitate the flow of clean oil filtered by the filter material 14 to the oil outlet 15. The filter material 14 is the core component for achieving high-precision filtration. It can intercept solid particles and colloidal impurities in the hydraulic oil caused by equipment wear and external intrusion. Its specific porous structure can efficiently capture tiny impurities without affecting the normal flow of hydraulic oil. The filtration accuracy can reach the micron level, preventing impurities from entering key components of the hydraulic system. The oil outlet 15 is used to discharge the clean hydraulic oil filtered by the filter material 14 from the filter element and deliver it to subsequent components of the hydraulic system (such as hydraulic pumps, valve groups, cylinders, etc.). Its outer port is designed to penetrate through and protrude from the end wall of the outer cylinder 11, which facilitates connection with the pipeline of the hydraulic system and ensures that the clean oil smoothly enters the system for circulation.

[0019] The cavity between the outer cylinder 11 and the filter material 14 is the outer cavity 21. An anti-impact top plate 22 is fixed inside the outer cavity 21, and the anti-impact top plate 22 is positioned directly opposite the oil inlet 12. An outer filter screen 23, an anti-impact outer side plate 24, and an anti-impact inner side plate 25 are also fixed in the outer cavity 21 from the outside to the inside.

[0020] The anti-impact top plate 22 is conical with its concave surface facing the oil inlet 12. When hydraulic oil enters from the oil inlet 12, it first contacts the anti-impact top plate 22. The conical concave structure can effectively disperse the impact force of the oil, slow down the oil flow rate, and prevent high-speed oil from directly impacting the subsequent filter media 14 and other components, reducing the damage to the filter media 14 caused by oil impact. At the same time, it can also reduce the impact of instantaneous fluctuations in oil pressure on the overall structure of the filter element. The outer filter screen 23 is made of a strong magnetic mesh material. Before the hydraulic oil enters the subsequent filtration stage, it performs preliminary filtration of the oil. It uses strong magnetic attraction to adsorb metal impurities in the oil, reducing the filtration burden on the filter media 14, extending the service life of the filter media 14, and also preventing metal impurities from impacting the filter media 14 at high speed, further protecting the filter media 14.

[0021] From the end view, the two are V-shaped and inverted V-shaped, respectively, and multiple sets are arranged in a ring array around the support member 13 and staggered in sequence. The outer anti-impact plate 24 can further buffer the oil flow rate after passing through the outer filter screen 23, change the oil flow direction, make the oil more evenly distributed, and avoid excessive local oil flow rate. The inner anti-impact plate 25 is set close to the filter material 14, which can directly protect the filter material 14 and prevent oil and impurities from directly impacting the surface of the filter material 14. At the same time, it can also help guide the oil to pass evenly through the filter material 14 and improve the filtration efficiency.

[0022] Furthermore, the anti-impact top plate 22 is cone-shaped, and the concave surface of the anti-impact top plate 22 is positioned directly opposite the oil inlet 12. The cone-shaped concave structure can effectively disperse the impact force of the oil, slow down the oil flow rate, and prevent high-speed oil from directly impacting the subsequent filter media 14 and other components.

[0023] Furthermore, the outer filter screen 23 is a strong magnetic adsorption screen, which uses strong magnetic adsorption properties to adsorb metal impurities in the oil, such as metal shavings generated by equipment wear, reducing the filtration burden on the filter material 14, extending the service life of the filter material 14, and at the same time preventing metal impurities from impacting the filter material 14 at high speed, further protecting the filter material 14.

[0024] Furthermore, from the end view, the outer anti-impact plate 24 and the inner anti-impact plate 25 are respectively set in a V-shape and an inverted V-shape. Both the outer anti-impact plate 24 and the inner anti-impact plate 25 are arranged in a ring array with the support member 13 as the center. The outer anti-impact plate 24 and the inner anti-impact plate 25 are arranged alternately. The outer anti-impact plate 24 can further buffer the oil flow rate after passing through the outer filter screen 23, change the oil flow direction, make the oil more evenly distributed, and avoid excessive local oil flow rate.

[0025] Furthermore, the anti-surge inner side plate 25 is set close to the filter media 14 to better protect the filter media 14, reduce the amount of oil between the anti-surge inner side plate 25 and the filter media 14, prevent oil and impurities from directly impacting the surface of the filter media 14, and at the same time help guide the oil to pass through the filter media 14 evenly, thereby improving the filtration efficiency.

[0026] Furthermore, a pressure sensor 26 is also installed on the outer cylinder 11. The pressure sensor 26 can monitor the pressure change of the hydraulic oil inside the outer cylinder 11 in real time. After the filter element has been used for a period of time, the impurities attached to the filter material 14 will gradually increase, which will lead to an increase in the hydraulic oil flow resistance and the pressure inside the outer cylinder 11 will rise accordingly. The pressure sensor 26 can detect this pressure change in time. When the pressure exceeds the set threshold, it can send an alarm signal to the hydraulic system or the operator to remind them to replace the filter element in time, so as to avoid the situation where the hydraulic pump cannot draw enough oil, the actuator moves slowly, or even the system pressure protection is triggered and the normal operation is interrupted due to the filter element being blocked.

[0027] The specific working principle of this utility model is as follows: During the operation of the hydraulic circulation system, hydraulic oil first enters the outer cylinder 11 through the oil inlet 12. The oil entering the system first comes into contact with the anti-impact top plate 22 directly opposite the oil inlet 12. The concave concave anti-impact top plate 22 buffers the oil, disperses the impact force of the oil, slows down the oil flow rate, and prevents the oil from directly impacting subsequent components. After being buffered by the anti-impact top plate 22, the oil continues to flow into the outer cavity 21. It then passes through the outer filter screen 23, which is a strong magnetic mesh that can adsorb metal impurities in the oil, performing preliminary filtration and reducing the filtration pressure of the subsequent filter material 14. After completing the preliminary filtration, the oil flows to the anti-impact outer side plate 24. The V-shaped anti-impact outer side plate 24 further changes the direction of oil flow, buffers the oil flow rate, and makes the oil more evenly distributed in the outer cavity 21. Afterward, the oil passes through the inverted V-shaped anti-impact outer side plate 24, which is staggered with the anti-impact outer side plate 24. The anti-impact inner side plate 25 further guides and buffers the oil, ensuring that the oil contacts and passes through the filter media 14 located close to it in a stable and uniform state. At the same time, it mainly prevents metal impurities inside the oil from directly impacting the filter media 14.

[0028] When the oil passes through the filter media 14, the filter media 14, with its high-precision porous structure, intercepts solid particles and colloidal impurities in the oil, achieving high-precision filtration of the oil. The filtered clean oil enters the support member 13 and is then discharged from the filter element through the oil outlet 15 at one end of the support member 13, and is delivered to key components of the hydraulic system such as the hydraulic pump, valve group, and cylinder, providing clean hydraulic oil for the stable operation of the hydraulic system. During the entire use process, the pressure sensor 26 on the outer cylinder 11 monitors the pressure changes inside the outer cylinder 11 in real time. When impurities accumulate on the filter media 14 to a certain extent, causing the oil flow resistance to increase and the pressure inside the outer cylinder 11 to exceed the set threshold, the pressure sensor 26 issues an alarm signal, prompting the operator to replace the filter element in time to ensure the continuous and stable operation of the hydraulic circulation system.

[0029] The above are merely preferred embodiments of the present utility model and do not limit the present utility model. Any modifications, equivalent substitutions, or improvements made to the technical solutions described in the foregoing embodiments, or to some of the technical features, shall be protected by the present utility model.

Claims

1. A high-precision filter cartridge for hydraulic circulating systems, comprising a main body assembly (1) and a protective assembly (2), characterized in that: The main component (1) includes an outer cylinder (11), an oil inlet (12) is fixedly connected to one end of the outer cylinder (11), a support member (13) is fixedly connected to the center of the inner cavity of the outer cylinder (11), a filter material (14) is provided on the outer periphery of the support member (13), an oil outlet (15) is fixedly connected to one end of the support member (13), and the outer port of the oil outlet (15) passes through and protrudes from the end wall of the outer cylinder (11); The cavity between the outer cylinder (11) and the filter material (14) is the outer cavity (21). An anti-impact top plate (22) is fixed in the outer cavity (21), and the anti-impact top plate (22) is set directly opposite the oil inlet (12). An outer filter screen (23), an anti-impact outer side plate (24), and an anti-impact inner side plate (25) are also fixed in the outer cavity (21) from the outside to the inside.

2. The high-precision filter element of claim 1, wherein: The anti-impact top plate (22) is tapered, and the concave surface of the anti-impact top plate (22) is positioned directly opposite the oil inlet (12).

3. The high-precision filter element of claim 1, wherein: The outer filter (23) is a strong magnetic mesh.

4. The high-precision filter element of claim 1, wherein: From the end view, the outer anti-impact plate (24) and the inner anti-impact plate (25) are respectively set in a V-shape and an inverted V-shape. The outer anti-impact plate (24) and the inner anti-impact plate (25) are arranged in a ring array with the support member (13) as the center, and the outer anti-impact plate (24) and the inner anti-impact plate (25) are arranged alternately in sequence.

5. The high-precision filter element of claim 4, wherein: The anti-impact inner plate (25) is positioned close to the filter material (14).

6. The high-precision filter element of claim 1, wherein: A pressure sensor (26) is also provided on the outer cylinder (11).

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