Purifying and filtering device of hydraulic system

Abstract

The utility model relates to a purifying and filtering device for a hydraulic system, which belongs to the technical field of hydraulic systems and comprises a cylinder body, an oil inlet hole and an oil outlet hole which are communicated with each other are respectively arranged at the upper end and the lower end of the cylinder body, and a filter screen is mounted in the cylinder body and positioned between the oil inlet hole and the oil outlet hole. Pressure sensors are arranged on the inner sides of the oil inlet hole and the oil outlet hole respectively. The oil filter has the advantages that return oil of a hydraulic system is filtered, and the oil filter is simple in structure, small in piezoresistance and not prone to blockage; the stable oil quality is guaranteed, the valve block, the electromagnetic valve and the like are prevented from being polluted by large-particle impurities to cause valve element clamping stagnation, the pressure sensor is used for monitoring the pressure on the two sides, the pressure difference is compared to give an alarm, and blocking is eliminated in advance.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic systems, in particular to a hydraulic system purification and filtering device. Background Art

[0002] Wind turbines include yaw brakes, which require hydraulic braking. Over extended use, wear materials, oil stains, and other debris from the brakes and other seals can clog the solenoid valve core, significantly increasing the failure rate of the turbine's yaw hydraulic system, impacting the number of uninterrupted turbine shutdowns and significantly increasing power loss. Prior art hydraulic system oil return devices in wind turbines lack return oil filtration and purification capabilities. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a filtering device with purification and filtering functions.

[0004] The technical solution of the utility model for solving the above technical problems is as follows: a hydraulic system purification and filtering device includes a cylinder body, wherein the upper and lower ends of the cylinder body are respectively provided with an oil inlet hole and an oil outlet hole which are interconnected, a filter screen is installed in the cylinder body, and the filter screen is located between the oil inlet hole and the oil outlet hole, and pressure sensors are respectively provided on the inner sides of the oil inlet hole and the oil outlet hole.

[0005] The beneficial effects of the utility model are: filtering the return oil of the hydraulic system, with a simple structure, low pressure resistance and not easy to be blocked; ensuring the stable quality of the oil, protecting the valve block and the solenoid valve from being contaminated by large particles of impurities and causing the valve core to be stuck, and monitoring the pressure on both sides through the pressure sensor, comparing the pressure difference to give an alarm, and eliminating the blockage in advance.

[0006] On the basis of the above technical solution, the present invention can also be improved as follows.

[0007] Furthermore, the cylinder body includes an upper end cover and a lower end cover, the upper end cover is provided with an upper mounting groove on the bottom surface, the oil inlet is located on the top surface of the upper end cover and is connected to the upper mounting groove, the lower end cover is provided with a lower mounting groove corresponding to the upper mounting groove on the top surface, the oil outlet is located on the bottom surface of the lower end cover and is connected to the lower mounting groove, and the filter is located in the upper mounting groove and the lower mounting groove.

[0008] The beneficial effect of adopting the above further solution is: limiting the position of the filter screen and preventing unfiltered oil from flowing out of the installation gap.

[0009] Furthermore, a plurality of core column holes are evenly opened on the bottom surface of the upper end cover around the geometric center, and core columns corresponding to the core column holes are fixed on the top surface of the lower end cover, and the core columns are located in the core column holes.

[0010] The beneficial effect of adopting the above further solution is that the core column is used to position the upper end cover and the lower end cover, which is convenient for installation and alignment of the upper installation groove and the lower installation groove.

[0011] Furthermore, the top surface of the upper end cover is provided with screw holes corresponding to the core column holes one by one, the screw holes are connected to the core column holes, and the screws pass through the screw holes and are threadedly connected to the top end of the core column.

[0012] The beneficial effect of adopting the above further solution is to prevent the upper end cover and the lower end cover from detaching.

[0013] Furthermore, the number of the core column holes is four.

[0014] The beneficial effects of adopting the above further solution are: more stable fixation and guaranteed force balance.

[0015] Furthermore, a sealing ring is provided between the upper mounting groove and the lower mounting groove.

[0016] The beneficial effect of adopting the above further solution is to prevent oil from leaking out from the joint gap between the upper mounting groove and the lower mounting groove.

[0017] Furthermore, the sealing ring is made of nitrile rubber.

[0018] The beneficial effect of adopting the above further solution is that the nitrile rubber has good oil resistance and does not react with oil products.

[0019] Furthermore, the oil inlet hole is provided with a straight-through connector connected to the hydraulic system.

[0020] The beneficial effect of adopting the above further solution is: better connection with the oil return pipe of the hydraulic system.

[0021] Furthermore, an alarm is provided outside the cylinder body, and the pressure sensor is electrically connected to the alarm.

[0022] The beneficial effect of adopting the above further solution is that the alarm reminds the staff of the pressure difference in the cylinder and the blockage is eliminated in time.

[0023] Furthermore, an anti-corrosion coating is provided inside the cylinder body.

[0024] The beneficial effects of adopting the above further solution are: it is not easily corroded by oil products and the service life of the equipment is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a cross-sectional view of the cylinder body of the present utility model.

[0026] Figure 2 It is an overall schematic diagram of the cylinder body of the present utility model.

[0027] Figure 3 It is a schematic diagram of the lower end cover of the present utility model.

[0028] Figure 4 It is a schematic diagram of the upper end cover of the present utility model.

[0029] Figure 5 This is a further schematic diagram of Example 2 (1).

[0030] Figure 6 This is a further schematic diagram of Example 2 (II).

[0031] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0032] 1. Oil inlet; 2. Oil outlet; 3. Filter; 4. Pressure sensor; 5. Upper end cover; 6. Upper mounting slot; 7. Lower end cover; 8. Lower mounting slot; 9. Core post hole; 10. Core post; 11. Screw hole; 12. Screw; 13. Straight-through connector; 14. Friction pattern; 15. Rotating shaft; 16. Friction wheel; 17. Turntable. DETAILED DESCRIPTION

[0033] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0034] Example 1

[0035] like Figures 1 to 4 As shown, a hydraulic system purification and filtering device includes a cylinder body, wherein the upper and lower ends of the cylinder body are respectively provided with an oil inlet hole 1 and an oil outlet hole 2 that are connected to each other, a filter screen 3 is installed in the cylinder body, and the filter screen 3 is located between the oil inlet hole 1 and the oil outlet hole 2, and pressure sensors 4 are respectively provided on the inner sides of the oil inlet hole 1 and the oil outlet hole 2.

[0036] The beneficial effects of this embodiment are: filtering the return oil of the hydraulic system, with a simple structure, low pressure resistance and not easy to clog; ensuring the stability of oil quality, protecting the valve block and solenoid valve from being contaminated by large particles of impurities that may cause the valve core to become stuck, and monitoring the pressure on both sides through the pressure sensor 4, comparing the pressure difference to issue an alarm, and eliminating blockage in advance.

[0037] Specifically, when the oil in the hydraulic system is circulated, impurities from wear and tear of other components and various oil stains will gradually accumulate, affecting the use of the hydraulic system. In this embodiment, the return oil line of the hydraulic system is connected to the oil inlet 1. After the oil is filtered by the filter 3, it returns to the hydraulic system through the oil outlet 2, achieving filtration and protecting various components of the hydraulic system.

[0038] Pressure sensors 4 are respectively provided in the oil inlet 1 and the oil outlet 2. The pressure sensor 4 is a pressure-sensitive sensor. The oil flowing in the pipeline exerts pressure on the pressure sensor 4. The pressure sensor 4 generates an electrical signal through the piezoelectric effect and transmits it. If the pressure difference between the two sides is too large, it proves that the filter 3 is clogged and needs to be cleaned.

[0039] Example 2

[0040] like Figures 1 to 4 As shown, preferably, on the basis of Example 1, the cylinder body includes an upper end cover 5 and a lower end cover 7, the upper end cover 5 is provided with an upper mounting groove 6 on the bottom surface, the oil inlet hole 1 is located on the top surface of the upper end cover 5 and is connected with the upper mounting groove 6, the lower end cover 7 is provided with a lower mounting groove 8 corresponding to the upper mounting groove 6 on the top surface, the oil outlet hole 2 is located on the bottom surface of the lower end cover 7 and is connected with the lower mounting groove 8, and the filter screen 3 is located in the upper mounting groove 6 and the lower mounting groove 8.

[0041] The beneficial effect of adopting the preferred solution in the above embodiment is: limiting the position of the filter 3 to prevent unfiltered oil from flowing out of the installation gap.

[0042] Specifically, the filter screen 3 includes a mounting ring and a filter screen fixed inside. The upper mounting groove 6 and the lower mounting groove 8 are both circular, and the two form a circular mounting chamber. The filter screen 3 is placed in the mounting chamber.

[0043] As a further solution of this embodiment, Figure 5 and Figure 6 As shown, the filter screen 3 is installed in the upper mounting groove 6 and the lower mounting groove 8, and the axis of the filter screen 3 is eccentrically arranged with the axis of the oil inlet hole 1;

[0044] Specifically, a friction pattern 14 is provided on the outer peripheral wall of the mounting ring of the filter 3. A rotating shaft 15 is rotatably mounted in the upper end cover 5. The axis of the rotating shaft 15 is parallel to the axis of the filter 3. One end of the rotating shaft 15 extends into the upper mounting groove 6 and is fixedly connected to a friction wheel 16. The friction wheel 16 is in frictional contact with the friction pattern 14. The other end of the rotating shaft 15 extends to the top of the upper end cover 5 and is fixedly connected to a turntable 17.

[0045] If the filter 3 is slightly clogged, it is too cumbersome to disassemble the cylinder to clean the filter 3. Therefore, the filter 3 is installed slightly eccentrically. When a pressure difference occurs in the pressure sensor 4, the staff uses their fingers to turn the turntable 17, and the turntable 17 drives the friction wheel 16 to rotate. The friction wheel 16 drives the filter 3 to rotate through the friction force, and rotates the eccentric filter 3 to another position just below the oil inlet hole 1 to alleviate the blockage. Repeat this several times before disassembling the cylinder to clean the filter 3. This can effectively reduce the number of times the cylinder is disassembled and improve work efficiency.

[0046] Example 3

[0047] like Figures 1 to 4 As shown, preferably, on the basis of Examples 1-2, a plurality of core column holes 9 are evenly opened on the bottom surface of the upper end cover 5 around the geometric center, and a core column 10 corresponding to the core column holes 9 is fixed on the top surface of the lower end cover 7, and the core column 10 is located in the core column hole 9.

[0048] The beneficial effect of adopting the preferred solution in the above embodiment is that the core column 10 positions the upper end cover 5 and the lower end cover 7, making it easy to install and align the upper installation groove 6 and the lower installation groove 8.

[0049] Preferably, the top surface of the upper end cover 5 is provided with screw holes 11 corresponding to the core column holes 9 one by one, the screw holes 11 are connected to the core column holes 9, and the screws 12 pass through the screw holes 11 and are threadedly connected to the top of the core column 10.

[0050] The beneficial effect of adopting the preferred solution in the above embodiment is to prevent the upper end cover 5 and the lower end cover 7 from being separated.

[0051] Preferably, the number of the core column holes 9 is four.

[0052] The beneficial effects of adopting the preferred solution in the above embodiment are: more stable fixation and guaranteed force balance.

[0053] Specifically, the core column 10 can be fixedly welded to the top surface of the lower end cover 7, or a plurality of threaded mounting holes can be opened on the top surface of the lower end cover 7. The lower end of the core column 10 is screwed into the threaded mounting hole, and the top end of the core column 10 is inserted into the core column hole 9 of the upper end cover 5. The core column 10 connects the upper end cover 5 and the lower end cover 7, and then the upper end cover 5 and the core column 10 are fixed through the screw hole 11 to achieve a stable connection and facilitate disassembly.

[0054] Example 4

[0055] like Figures 1 to 4 As shown, preferably, on the basis of embodiments 1-3, a sealing ring is provided between the upper mounting groove 6 and the lower mounting groove 8 .

[0056] The beneficial effect of adopting the preferred solution in the above embodiment is to prevent oil from leaking out from the joint gap between the upper mounting groove 6 and the lower mounting groove 8.

[0057] Preferably, the sealing ring is made of nitrile rubber.

[0058] The beneficial effect of adopting the preferred solution in the above embodiment is that the nitrile rubber has good oil resistance and does not react with oil products.

[0059] Specifically, the sealing ring is installed on the joint surface of the upper end cover 5 and the lower end cover 7, and is located on the outside of the upper mounting groove 6 and the lower mounting groove 8. Nitrile rubber is a copolymer formed by the polymerization of acrylonitrile and butadiene monomers. It has extremely excellent oil resistance and is better adapted to various oil environments.

[0060] Example 5

[0061] like Figures 1 to 4 As shown, preferably, on the basis of embodiments 1-4, a through-connector 13 communicating with the hydraulic system is provided on the oil inlet hole 1.

[0062] The beneficial effect of adopting the preferred solution in the above embodiment is: better connection with the oil return pipe of the hydraulic system.

[0063] Example 6

[0064] like Figures 1 to 4 As shown, preferably, on the basis of embodiments 1-5, an alarm is provided outside the cylinder body, and the pressure sensor 4 is electrically connected to the alarm.

[0065] The beneficial effect of adopting the preferred solution in the above embodiment is that the alarm reminds the staff of the pressure difference in the cylinder and eliminates the blockage in time.

[0066] Example 7

[0067] like Figures 1 to 4 As shown, preferably, based on embodiments 1-6, an anti-corrosion coating is provided in the cylinder body.

[0068] The beneficial effects of adopting the preferred solution in the above embodiment are: it is not easily corroded by oil products and the service life of the equipment is extended.

[0069] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0070] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0071] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0072] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0073] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0074] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A hydraulic system purification and filtering device, characterized in that: The invention comprises a cylinder body, wherein the upper and lower ends of the cylinder body are respectively provided with an oil inlet hole (1) and an oil outlet hole (2) which are connected to each other, a filter screen (3) is installed in the cylinder body, and the filter screen (3) is located between the oil inlet hole (1) and the oil outlet hole (2), and pressure sensors (4) are respectively provided inside the oil inlet hole (1) and the oil outlet hole (2).

2. A hydraulic system purification and filtering device according to claim 1, characterized in that: The cylinder body comprises an upper end cover (5) and a lower end cover (7); an upper mounting groove (6) is provided on the bottom surface of the upper end cover (5); the oil inlet hole (1) is located on the top surface of the upper end cover (5) and is communicated with the upper mounting groove (6); a lower mounting groove (8) corresponding to the upper mounting groove (6) is provided on the top surface of the lower end cover (7); the oil outlet hole (2) is located on the bottom surface of the lower end cover (7) and is communicated with the lower mounting groove (8); and the filter screen (3) is located in the upper mounting groove (6) and the lower mounting groove (8).

3. A hydraulic system purification and filtering device according to claim 2, characterized in that: The bottom surface of the upper end cover (5) is evenly provided with a plurality of core column holes (9) around the geometric center, and the top surface of the lower end cover (7) is fixed with core columns (10) corresponding to the core column holes (9) one by one, and the core columns (10) are located in the core column holes (9).

4. A hydraulic system purification and filtering device according to claim 3, characterized in that: The top surface of the upper end cover (5) is provided with screw holes (11) corresponding to the core column holes (9) one by one, the screw holes (11) are communicated with the core column holes (9), and the screws (12) pass through the screw holes (11) and are threadedly connected to the top of the core column (10).

5. The hydraulic system purification and filtering device according to claim 3, characterized in that: The number of the core column holes (9) is four.

6. The hydraulic system purification and filtering device according to claim 2, characterized in that: A sealing ring is provided between the upper mounting groove (6) and the lower mounting groove (8).

7. A hydraulic system purification and filtering device according to claim 6, characterized in that: The sealing ring is made of nitrile rubber.

8. The hydraulic system purification and filtering device according to claim 1, characterized in that: The oil inlet hole (1) is provided with a straight-through connector (13) for communicating with the hydraulic system.

9. The hydraulic system purification and filtering device according to any one of claims 1 to 8, characterized in that: An alarm is provided outside the cylinder body, and the pressure sensor (4) is electrically connected to the alarm.

10. The hydraulic system purification and filtering device according to any one of claims 1 to 8, characterized in that: An anti-corrosion coating is provided in the cylinder body.

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