Oil drainage pipeline structure
By introducing a filter element and a bypass valve into the drain line, the problem of variable pump jamming caused by direct return of drained oil from the actuator to the oil tank is solved, achieving impurity filtration and system protection, and ensuring the stable operation of the hydraulic system.
Patent Information
- Application Number
- CN202520159369.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-23
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2035-01-23
AI Technical Summary
In a variable pump system, the oil drain from the actuator returns directly to the oil tank without passing through an oil filter, causing debris and impurities to be sucked into the variable pump, leading to pump seizure and failure, resulting in economic losses.
Design an oil drain pipeline structure, including an oil drain pipe, a pipeline filter and a pipe joint connected in sequence. The pipeline filter is equipped with a filter element and a bypass valve. Impurities are filtered through the filter element, and the bypass valve opens when the pressure reaches a certain value to avoid back pressure damaging hydraulic components.
It effectively filters impurities in the drain oil, prevents damage to the variable pump, ensures normal system operation, avoids wear or broken fragments of actuators from entering the variable pump, and protects the integrity of the hydraulic system.
Smart Images
Figure CN223594620U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of hydraulic system especially relates to a leak oil pipeline structure. BACKGROUND
[0002] Generally, the oil return of hydraulic oil circuit will pass radiator and oil return filter to return to oil tank, but in variable system, in order to prevent the failure or response delay of actuating element, generally, oil suction filter is not allowed to be set, and the oil leakage of each actuating element such as motor and pilot directly returns to oil tank without filter, once the actuating element such as motor fails in such oil circuit, its debris and residues will directly return to oil tank along with the oil leakage pipeline, and the debris and impurities will be sucked into the variable pump, so that the variable pump is stuck and fails, and the economic loss is large. SUMMARY
[0003] In order to solve the above technical problems, the utility model discloses a kind of leak oil pipeline structures, which can avoid oil pump damage, and also does not damage hydraulic element.
[0004] In order to realize the above-mentioned utility model purposes, the utility model adopts the following technical solutions:
[0005] A kind of leak oil pipeline structure, including sequentially connected leak oil pipe, pipeline filter and pipe joint, the pipeline filter includes filter housing and filter element arranged in filter housing, both ends of the filter housing are respectively equipped with oil inlet and oil outlet, and oil inlet and oil outlet are located at both sides of filter element respectively, and the connection of filter element in filter housing and filter housing is also equipped with bypass valve.
[0006] As a preferred scheme, a plurality of leak oil ports respectively communicated with each pressure relief element are arranged side by side on the leak oil pipe.
[0007] As a preferred scheme, a bracket is fixed on the pipeline filter, and the bracket fixedly connects the pipeline filter and the vehicle frame.
[0008] As a preferred scheme, the nominal pressure of the pipeline filter is 10MPa, and the nominal flow rate is 240L / min, the filter element is a stainless steel filter element, and the filtering accuracy is 100um.
[0009] As a preferred scheme, a transmitter is further arranged on the pipeline filter, and the transmission value of the transmitter is 4-6bar.
[0010] As a preferred scheme, the opening pressure of the bypass valve is 6-8bar.
[0011] Compared with the prior art, the utility model has the beneficial effects that:
[0012] The utility model discloses a big flow pipeline filter is set up to the oil tank through the oil drain pipe of all the actuating element, and the structure can avoid the motor abrasion impurity of actuating element or the fragment of actuating element rupture with the oil tank directly through the oil drain pipeline, and then be absorbed by the variable pump and cause the pump damage, and simultaneously, the filter is equipped with a bypass valve, and the pressure is less than the pressure of each actuating element, and the hydraulic element will not be damaged due to back pressure. BRIEF DESCRIPTION OF DRAWINGS
[0013] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification. The illustrations are given for the purpose of explaining the application and are not intended to limit the application in its application to such details.
[0014] Figure 1 It is the overall structure schematic diagram of the utility model;
[0015] Figure 2 It is the structure schematic diagram of the pipeline filter of the utility model.
[0016] The figure sign is: 1, the oil drain pipe;11, the oil drain port;2, the pipeline filter;3, the pipe joint;4, the support;21, the filter shell;22, the oil inlet;23, the filter element;24, the oil outlet;25, the bypass valve. DETAILED DESCRIPTION
[0017] It should be noted that the following detailed description is exemplary only and is intended to provide further description of the present application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
[0018] It should be noted that the terms used herein are merely for the purpose of describing the specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should be further understood that the terms "comprise" and / or "include" as used herein indicate the presence of the features, steps, operations, devices, components and / or combinations thereof.
[0019] In addition, in the description of the utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.
[0020] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.
[0021] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0022] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments:
[0024] like Figure 1 and Figure 2 As shown, an oil drain pipeline structure includes an oil drain pipe 1, a pipeline filter 2, and a pipe connector 3 connected in sequence. The pipeline filter 2 includes a filter housing 21 and a filter element 23 disposed inside the filter housing 21. The filter housing 21 has an oil inlet 22 and an oil outlet 24 at its two ends, and the oil inlet 22 and the oil outlet 24 are located on both sides of the filter element 23. A bypass valve 25 is also provided at the connection between the filter element 23 and the filter housing 21.
[0025] The drain pipe 1 is provided with multiple drain ports 11 arranged side by side, each connected to a pressure relief element. The pipeline filter 2 is fixed with a bracket 4, which securely connects the pipeline filter 2 to the vehicle frame.
[0026] The pipeline filter 2 has a nominal pressure of 10 MPa and a nominal flow of 240 L / min, and the filter element 23 is a stainless steel filter element with a filtering accuracy of 100 um. The pipeline filter 2 is further provided with a transmitter, and the transmitter has a transmission value of 4-6 bar. The opening pressure of the bypass valve 25 is 6-8 bar.
[0027] The working principle of the utility model is as follows:
[0028] I. After the pipeline filter 2 is correctly connected to the pipeline, the oil flows in the direction of A-B-C, and when the oil passes through the filter element, the filter element filters the particulate impurities in the oil in the outer cavity of the filter element, and the filtered clean oil flows into the downstream oil circuit system.
[0029] II. After the pipeline filter 2 is used, the filter element outer cavity also deposits impurities generated in the system at the same time as the clean oil. When the dirt deposits to a certain extent, the oil is difficult to flow smoothly along the path of A-B-C. (Ignore the pressure of the C oil cavity) The AB cavity pressure continues to rise, and when the pressure increases to 5 bar, the transmitter acts, and the red indicator of the transmitter pops out. At this time, the filter element should be replaced in time to ensure the normal operation of the filter. When the AB cavity pressure continues to rise to 7 bar, the filter bypass valve opens, and the oil flows along A-D-C. At this time, the contaminated core should be replaced as soon as possible to ensure the normal operation of the system. The structure of the utility model has been tested for 2 years, and can fully meet the expected effect, which can not only avoid damage to the oil pump, but also meet the pressure relief requirements of the actuator.
[0030] In the description of the present application, the description of 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 utility model. In the present application, the illustrative description of the above terms does 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.
[0031] Although the embodiments of the utility model have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the utility model. The ordinary skilled in the art can make changes, modifications, replacements and modifications to the above-mentioned embodiments without departing from the principles and purposes of the utility model within the scope of the utility model. Any simple modification, equivalent change and modification made according to the technical essence of the utility model to the above-mentioned embodiments still belongs to the scope of the technical scheme of the utility model.
Claims
1. An oil drain line structure, characterized by: The oil drain pipe (1), the pipeline filter (2) and the pipe joint (3) are connected in sequence, the pipeline filter (2) comprises a filter housing (21) and a filter element (23) arranged in the filter housing (21), both ends of the filter housing (21) are respectively provided with an oil inlet (22) and an oil outlet (24), the oil inlet (22) and the oil outlet (24) are respectively located on both sides of the filter element (23), and a bypass valve (25) is further arranged at the connection between the filter element (23) and the filter housing (21) in the filter housing (21).
2. The oil drain line structure according to claim 1, characterized by A plurality of oil drain ports (11) are arranged side by side on the oil drain pipe (1) and respectively communicate with the respective pressure relief elements.
3. The oil drain line structure according to claim 1, characterized by A support (4) is fixed on the pipeline filter (2), and the support (4) fixedly connects the pipeline filter (2) and the vehicle frame.
4. The oil drain line structure according to claim 1, characterized by The nominal pressure of the pipeline filter (2) is 10 MPa, the nominal flow rate is 240 L / min, the filter element (23) is a stainless steel filter element, and the filtering precision is 100 um.
5. The oil drain line structure according to claim 1, characterized by A signal transmitter is further arranged on the pipeline filter (2), and the signal value of the signal transmitter is 4-6 bar.
6. The oil drain line structure according to claim 1, characterized by The opening pressure of the bypass valve (25) is 6-8 bar.