Hydraulic oil tank and hydraulic system

Abstract

This application provides a hydraulic oil tank and a hydraulic system. The hydraulic oil tank includes a tank body, a return oil tank, and a defoaming component. By incorporating the return oil tank and the defoaming component, oil overflowing from the return oil hole of the return oil tank can flow along the defoaming component. This creates an upward flow path for the oil in the return oil tank, and an outward flow path as the oil flows sequentially along the return oil tank and the defoaming component. This extends the flow path of the oil within the tank body, increases the time for bubble separation, and helps reduce the oil temperature. The defoaming component includes a first defoaming part and a second defoaming part. The first defoaming part extends at an angle relative to the tank wall of the return oil tank, further extending the flow path of the oil after it flows out of the return oil tank, facilitating the separation of oil and bubbles, and improving defoaming efficiency. By incorporating a hydraulic oil tank into the hydraulic system, bubbles in the hydraulic system are reduced, improving the operational reliability of the hydraulic system and the service life of its components.

Description

Technical Field

[0001] This application relates to the technical field of hydraulic systems, and more particularly to a hydraulic tank and a hydraulic system. Background Technology

[0002] Hydraulic systems are widely used in engineering machinery products. A hydraulic system consists of pumps, valves, cylinders or motors, and hydraulic oil tanks. During operation, air bubbles are inevitably introduced into the hydraulic oil in the tank, and this hydraulic oil containing a large number of air bubbles enters the pumps, cylinders, and other components.

[0003] The hydraulic oil tank in a hydraulic system stores hydraulic oil, cools it, allows impurities to settle, and separates air bubbles from the oil. Existing hydraulic oil tanks are equipped with return oil filters, which can filter out some solid particles and gases.

[0004] However, existing hydraulic oil tanks suffer from poor cooling and defoaming effects. Summary of the Invention

[0005] This application provides a hydraulic oil tank and a hydraulic system. The hydraulic oil tank can extend the flow path of the oil, improve the defoaming efficiency of the oil, reduce the temperature of the oil, improve the cooling efficiency of the oil, and improve the working reliability of the hydraulic system.

[0006] In a first aspect, this application provides a hydraulic oil tank, including a tank body, a return oil tank, and an anti-foaming component. The tank body includes a return oil port and a suction oil port communicating with a cavity of the tank body, and the anti-foaming component and the return oil tank are disposed in the cavity.

[0007] The return oil tank is equipped with an oil inlet and an oil return hole that are connected to the return oil chamber of the return oil tank. The oil inlet and the oil return hole are connected. The defoaming component is located near the oil return hole. The oil overflowing through the oil return hole flows through the defoaming component and flows to the oil suction port.

[0008] The defoaming component includes a first defoaming part and a second defoaming part. The first end of the first defoaming part is close to the oil return hole, and the second end of the first defoaming part extends away from the oil return hole and is connected to the second defoaming part. The extension directions of the first defoaming part and the extension directions of the second defoaming part intersect each other.

[0009] In the aforementioned hydraulic oil tank, optionally, the tank wall with the return oil hole is the first tank wall, and the first end of the first defoaming part is attached to the first tank wall and abuts against the bottom end of the return oil hole.

[0010] The first defoaming section extends at an angle relative to the first box wall, and the second end of the first defoaming section is inclined away from the first box wall compared to the first end of the first defoaming section.

[0011] In the aforementioned hydraulic oil tank, optionally, the first end of the second defoaming part is connected to the first tank wall, and the second end of the second defoaming part extends away from the first tank wall and is connected to the second end of the first defoaming part.

[0012] The first defoaming section, the second defoaming section, and part of the first box wall together form the defoaming zone.

[0013] In the aforementioned hydraulic oil tank, optionally, the angle between the extending direction of the first defoaming part and the extending direction of the second defoaming part is greater than or equal to 60° and less than or equal to 80°.

[0014] In the aforementioned hydraulic oil tank, optionally, the surfaces of the first defoaming section and the second defoaming section are provided with a plurality of defoaming holes arranged in an array.

[0015] And / or, the surfaces of the first defoaming part and the second defoaming part are provided with a plurality of defoaming protrusions arranged in an array.

[0016] In the aforementioned hydraulic oil tank, optionally, there are multiple return oil holes and defoaming components. The multiple return oil holes are respectively set on two opposite side walls of the return oil tank, and the multiple defoaming components and multiple return oil holes are set one-to-one.

[0017] And / or, the return oil hole is located near the top of the return oil tank.

[0018] Optionally, the hydraulic oil tank described above may also include a partition plate, which is disposed in the cavity and divides the cavity into a first cavity and a second cavity. The return oil tank and the defoaming component are both located in the first cavity.

[0019] The partition member includes a first partition section and a second partition section that are connected to each other. The first partition section extends horizontally and the second partition section extends vertically. The second partition section is located at the bottom of the first partition section.

[0020] The return oil tank includes a second tank wall located at the bottom of the return oil tank. A first partition section is located at the bottom of the second tank wall and is spaced apart from the second tank wall in the vertical direction. At least a portion of the first partition section corresponds to the second tank wall in the vertical direction.

[0021] The second cavity is equipped with an oil suction pipe that communicates with the oil suction port, and the second partition section has an opening that communicates with the oil suction pipe.

[0022] Optionally, the hydraulic oil tank may also include multiple return oil filters and multiple return oil pipes. At least some of the return oil filters are located outside the tank body. The return oil pipes are connected to the return oil filters, extend into the return oil port, and communicate with the return oil tank.

[0023] The bottom of the return oil pipe inside the return oil tank is lower than the setting height of the return oil hole.

[0024] Optionally, the hydraulic oil tank described above may also include a level detection element, the detection end of which is located in the cavity, and the level detection element is configured to detect the level of the oil inside the tank.

[0025] And / or, the hydraulic tank also includes a temperature sensing element, the sensing end of which is located in the cavity, and the temperature sensing element is configured to detect the temperature of the oil inside the tank.

[0026] And / or, the hydraulic tank also includes an air filter that communicates with the cavity.

[0027] Secondly, this application provides a hydraulic system, including a pump body, a return oil line and a suction oil line and a hydraulic oil tank, wherein the return oil line and the return oil filter of the hydraulic oil tank are connected, the suction oil line and the suction port of the hydraulic oil tank are connected, and the pump body is connected to at least one of the suction oil line and the return oil line.

[0028] This application provides a hydraulic oil tank and hydraulic system. The hydraulic oil tank includes a tank body, a return oil tank, and a defoaming component. By incorporating the return oil tank and the defoaming component, oil overflowing from the return oil hole of the return oil tank can flow along the defoaming component. This creates an upward flow path for the oil in the return oil tank, and an outward flow path as the oil flows sequentially along the return oil tank and the defoaming component. This extends the flow path of the oil within the tank body, increases the time for bubble separation, and helps reduce the oil temperature, improving cooling efficiency. The defoaming component includes a first defoaming section and a second defoaming section. The first defoaming section extends at an angle relative to the tank wall of the return oil tank, further extending the flow path of the oil after it flows out of the return oil tank, facilitating the separation of oil and bubbles, and improving defoaming efficiency. By incorporating a hydraulic oil tank into the hydraulic system, bubbles in the hydraulic system are reduced, improving the operational reliability of the hydraulic system and the service life of its components.

[0029] The structure of this application, as well as its other practical purposes and beneficial effects, will become more apparent and understandable through the description of the preferred embodiments in conjunction with the accompanying drawings. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a first-view structural schematic diagram of the hydraulic oil tank provided in an embodiment of this application;

[0032] Figure 2This is a second-view structural schematic diagram of the hydraulic oil tank provided in an embodiment of this application;

[0033] Figure 3 A third-view structural schematic diagram of the hydraulic oil tank provided in an embodiment of this application;

[0034] Figure 4 This is a schematic diagram of the structure of the defoaming component of the hydraulic oil tank provided in the embodiments of this application.

[0035] Explanation of reference numerals in the attached figures:

[0036] 100: Housing; 200: Oil return tank; 300: Defoaming component; 400: Partition component;

[0037] 101: Oil suction port;

[0038] 201: Oil return hole;

[0039] 301: First defoaming section; 302: Second defoaming section;

[0040] 401: First partition section; 402: Second partition section; 403: Third partition section;

[0041] 500: Oil return filter; 600: Oil return pipe; 700: Air filter; 800: Liquid level detection element.

[0042] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0043] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0044] The inventors of this application discovered during their research that a hydraulic system is a system that uses oil as its working medium, utilizes the pressure energy of the oil, and drives a hydraulic actuator through control valves and other components. A hydraulic system includes a pump, control valves, and a hydraulic oil tank. The hydraulic oil tank serves to store the oil required by the hydraulic system, dissipate heat from the flowing, heated oil, and also allows impurities in the oil to settle and reduces air bubbles in the oil.

[0045] During the operation of a hydraulic system, gas inevitably mixes into the oil, with tiny gas molecules forming bubbles. In existing technology, when the oil enters the hydraulic tank, it first passes through a return filter element located on the tank. This filter removes some solid particles and gas from the oil before it flows into the interior of the hydraulic tank.

[0046] However, return oil filters cannot completely remove air bubbles from the oil. Air bubbles still exist in the oil entering the hydraulic tank. As the oil flows naturally within the tank, these air bubbles also move freely. Therefore, existing hydraulic tanks suffer from low air bubble removal efficiency and poor oil cooling. Furthermore, the presence of air bubbles in the oil reduces its bulk elasticity coefficient, increasing its compressibility and decreasing the reliability of the hydraulic system. During operation, when the oil enters hydraulic components, the localized high temperatures generated by the compression of air bubbles cause incomplete combustion of the oil. This leads to premature oxidation and deterioration of the oil, causing cavitation damage to hydraulic system components and reducing the service life of the hydraulic system.

[0047] In view of this, this application provides a hydraulic oil tank and a hydraulic system. The hydraulic oil tank includes a tank body, a return oil tank, and a defoaming component. By providing the defoaming component, the oil overflowing from the return oil hole of the return oil tank can flow along the defoaming component. This creates an upward flow path for the oil in the return oil tank, and an outward flow path through the return oil tank and the defoaming component, extending the flow path of the oil, increasing the time for bubble separation in the oil, and also helping to reduce the oil temperature. The defoaming component includes a first defoaming part and a second defoaming part. The extension direction of the first defoaming part is inclined relative to the tank wall of the return oil tank, further extending the flow path of the oil after it flows out of the return oil tank, which is beneficial for the separation of oil and bubbles and improves the defoaming efficiency of the hydraulic oil tank. Simultaneously, extending the flow path of the oil also reduces the oil temperature, preventing oil oxidation and deterioration, and improving the quality of the oil. By providing this hydraulic oil tank in the hydraulic system, bubbles in the hydraulic system are reduced, the oil temperature is lowered, the cooling efficiency of the oil is improved, the working reliability of the hydraulic system is improved, and the service life of the various components of the hydraulic system is extended.

[0048] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0049] Firstly, referring to Figures 1 to 3 As shown, this application provides a hydraulic oil tank, including a tank body 100, a return oil tank 200 and an anti-foaming component 300. The tank body 100 includes a return oil port and an oil suction port 101 communicating with the cavity of the tank body 100. The anti-foaming component 300 and the return oil tank 200 are disposed in the cavity.

[0050] The return oil tank 200 is provided with an oil inlet and an oil return hole 201 that are connected to the return oil chamber of the return oil tank 200. The oil inlet and the oil return hole are connected. The defoaming component 300 is provided near the oil return hole 201. The oil overflowing through the oil return hole 201 flows through the defoaming component 300 and flows to the oil suction port 101.

[0051] The defoaming component 300 includes a first defoaming part 301 and a second defoaming part 302. The first end of the first defoaming part 301 is close to the oil return hole 201, and the second end of the first defoaming part 301 extends away from the oil return hole 201 and is connected to the second defoaming part 302. The extension direction of the first defoaming part 301 and the extension direction of the second defoaming part 302 intersect each other.

[0052] For example, during the operation of the hydraulic oil tank, the oil enters the return oil tank 200 inside the tank 100 from the return oil port at the top of the tank 100. The oil is stored and flows inside the return oil tank 200. When the interface of the oil stored inside the return oil tank 200 is flush with the bottom of the return oil hole 201, the oil overflows from the return oil hole 201 onto the defoaming component 300. The oil gradually flows away from the return oil hole 201 along the defoaming component 300, and finally flows to the suction port 101 and leaves the hydraulic oil tank. During this process, as the oil gradually accumulates in the return oil tank 200, and as the oil overflows from the return oil hole 201 and moves away from the return oil hole 201 along the defoaming component 300, the flow path of the oil in the hydraulic oil tank is extended. This ensures that the oil forms a flow path from bottom to top and from inside to outside within the hydraulic oil tank, guaranteeing sufficient defoaming time for the oil and improving the defoaming efficiency. At the same time, extending the flow path of the oil also reduces the temperature of the oil, preventing oxidation and deterioration and improving the quality of the oil.

[0053] For example, when the first end of the first defoaming part 301 is close to the oil return hole 201 and the second end of the first defoaming part 301 extends away from the oil return hole 201, the extension direction of the first defoaming part 301 and the extension direction of the second defoaming part 302 intersect each other, which can effectively extend the flow path of the oil after it overflows from the oil return hole 201, provide sufficient defoaming time for the bubbles in the oil, and reduce the temperature of the oil.

[0054] For example, the defoaming component 300 can be a defoaming mesh partition.

[0055] As one feasible implementation, the hydraulic oil tank also includes a plurality of return oil filters 500 and a plurality of return oil pipes 600. At least some of the return oil filters 500 are disposed outside the tank body 100. The return oil pipes 600 are connected to the return oil filters 500, and the return oil pipes 600 extend into the return oil port and communicate with the return oil tank 200.

[0056] The bottom of the return oil pipe 600 inside the return oil tank 200 is lower than the setting height of the return oil hole 201.

[0057] For example, the return oil filter 500 can filter contaminants generated or infiltrated in the oil within the hydraulic system, and the filtered oil enters the return oil tank 200 through the return oil pipe 600.

[0058] For example, the return oil filter element 500 includes a return oil filter and a drain oil filter. The return oil filter and the drain oil filter are respectively connected to the corresponding return oil lines in the hydraulic system.

[0059] For example, when the bottom of the return oil pipe 600 inside the return oil tank 200 is lower than the height of the return oil hole 201, the oil enters the return oil tank 200 from the return oil pipe 600. The return oil tank 200 stores the incoming oil. As the oil continues to flow in, the oil interface gradually rises. When the oil interface is level with the bottom of the return oil pipe 600 inside the return oil tank 200, the oil interface continues to rise until it is level with the bottom of the return oil hole 201. At this point, the oil overflows from the return oil tank 200 through the return oil hole 201. In this way, the flow path of the oil in the hydraulic oil tank is from bottom to top, which prolongs the flow path of the oil and ensures that the oil has sufficient time to defoam, which is beneficial to the elimination of air bubbles in the oil.

[0060] As one possible implementation, the hydraulic oil tank also includes a level detection element 800, the detection end of which is located in the cavity, and the level detection element 800 is configured to detect the level of the oil inside the tank 100.

[0061] In some embodiments, the hydraulic tank further includes a temperature sensing element, the sensing end of which is located in the cavity, and the temperature sensing element is configured to detect the temperature of the oil inside the tank 100.

[0062] In other embodiments, the hydraulic tank also includes an air filter 700, which is in communication with the cavity.

[0063] For example, the level detection element 800 can be installed on the housing 100. The detection end of the level detection element 800 is located in the cavity, and the level of oil in the cavity can be detected in real time. The level detection element 800 can be a level gauge.

[0064] The temperature detection element can be installed on the cavity, with the detection end of the temperature detection element located in the cavity. It can detect the temperature of the oil in the cavity in real time. The temperature detection element can be a temperature sensor.

[0065] For example, the hydraulic oil tank body 100 can also be equipped with an air filter 700. The oil enters the return oil tank 200 through the return oil filter 500 and the return oil pipe 600. The return oil tank 200 continuously stores oil. Some of the air bubbles in the oil gradually rise to the surface, and some air bubbles leave the hydraulic oil tank through the air filter 700, further improving the defoaming ability of the hydraulic oil tank.

[0066] As one feasible implementation, there are multiple oil return holes 201 and multiple defoaming components 300. The multiple oil return holes 201 are respectively disposed on two opposite side walls of the oil return tank 200, and the multiple defoaming components 300 and multiple oil return holes 201 are disposed in a one-to-one correspondence.

[0067] As one possible implementation, the oil return hole 201 is located near the top of the oil return tank 200.

[0068] In some embodiments, there are two oil return holes 201 and two defoaming components 300. The two oil return holes 201 are respectively disposed on two opposite side walls of the oil return tank 200, with the oil return holes 201 close to the top of the oil return tank 200. The two defoaming components 300 are respectively disposed on the side walls below the two oil return holes 201. When the oil flows into the oil return tank 200 sequentially through the oil return filter 500 and the oil return pipe 600, as the interface of the oil inside the oil return tank 200 continuously rises, when the interface of the oil is flush with the bottom of the oil return hole 201, the oil overflows from the oil return holes 201 on the two side walls of the oil return tank 200. The overflowing oil gradually flows towards the oil suction port 101 along the defoaming component 300 below the oil return hole 201.

[0069] As one feasible implementation, the hydraulic oil tank also includes a partition 400, which is disposed in the cavity and divides the cavity into a first cavity and a second cavity. The return oil tank 200 and the defoaming component 300 are both located in the first cavity.

[0070] The partition member 400 includes a first partition section 401 and a second partition section 402 connected to each other. The first partition section 401 extends in a horizontal direction, and the second partition section 402 extends in a vertical direction. The second partition section 402 is located at the bottom of the first partition section 401.

[0071] The return oil tank 200 includes a second tank wall located at the bottom of the return oil tank 200. A first partition section 401 is located at the bottom of the second tank wall and is spaced from the second tank wall in the vertical direction. At least a portion of the first partition section 401 corresponds to the second tank wall in the vertical direction.

[0072] The second cavity is provided with an oil suction pipe that communicates with the oil suction port 101, and the second partition section 402 is provided with an opening that communicates with the oil suction pipe.

[0073] For example, the wall of the return oil tank 200 with the return oil hole 201 is defined as the first wall, the wall at the bottom of the return oil tank 200 is defined as the second wall, and the wall of the return oil tank 200 without the return oil hole 201 is defined as the third wall.

[0074] For example, the partition 400 divides the hydraulic oil tank into a first chamber and a second chamber, which are connected. The return oil tank 200 and the defoaming component 300 are disposed in the first chamber. The first chamber is connected to the return oil pipeline of the hydraulic system through the return oil port to collect oil from outside the hydraulic oil tank. The first chamber mainly serves the function of returning oil. The second chamber is connected to the suction oil pipeline of the hydraulic system through the suction oil port 101 to discharge oil from the hydraulic oil tank.

[0075] For example, the partition member 400 includes a first partition section 401 and a second partition section 402 connected to each other. The first end of the first partition section 401 corresponds vertically to the second tank wall of the return oil tank 200, and the second end of the first partition section 401 is connected to the tank body 100. The second partition section 402 is located at the bottom of the first partition section 401, and the first end of the second partition section 402 is connected to the first end of the first partition member 400. The second end of the second partition member 400 is connected to the bottom of the tank body 100. There is an included angle between the first partition section 401 and the second partition section 402. The included angle between the first partition section 401 and the second partition section 402 can be 80°, 90°, or 100°. This application does not limit the angle.

[0076] In some embodiments, the partition member 400 includes a first partition segment 401 and a second partition segment 402 connected to each other. The first partition segment 401 extends horizontally, with its first end corresponding vertically to the second wall of the return oil tank 200, and its second end connected to the tank body 100. The second partition segment 402 extends vertically, located at the bottom of the first partition segment 401, with its first end connected to the first end of the first partition member 400, and its second end connected to the bottom of the tank body 100. The included angle between the first partition segment 401 and the second partition segment 402 is a right angle.

[0077] Reference Figure 1 As shown, after the oil enters the return oil tank 200 from the return oil filter element 500 and the return oil pipe 600, the flow direction of the oil is as follows: Figure 1 As indicated by the black arrow, the oil is stored and flows inside the return oil tank 200. When the oil interface stored inside the return oil tank 200 is flush with the bottom of the return oil hole 201, the oil overflows from the return oil hole 201 onto the defoamer 300. The oil then flows along the defoamer 300 gradually away from the return oil hole 201. When the fluid leaves the defoamer 300, the oil flows to the first baffle section 401 located below the second tank wall. Subsequently, the oil flows along the first baffle section 401 to the second baffle section 402, and flows into the second cavity through the opening of the second baffle section 402. By setting the first baffle section 401 and the second baffle section 402, the flow path of the oil is further extended, ensuring sufficient defoaming time for the oil, which is beneficial to improving the defoaming efficiency of the oil. At the same time, extending the flow path of the oil also reduces the temperature of the oil, further improving the quality of the oil.

[0078] In other embodiments, the partition member 400 includes a first partition segment 401, a second partition segment 402, and a third partition segment 403. A first end of the first partition segment 401 is connected to a first end of the second partition segment 402, and a second end of the first partition segment 401 is connected to a first end of the third partition segment 403. The first partition segment 401 extends horizontally, while the second partition segment 402 and the third partition segment 403 both extend vertically. The second end of the second partition segment 402 is connected to the bottom of the housing 100, and the second end of the third partition member 400 is connected to the top of the housing 100. Thus, the first partition segment 401, the second partition segment 402, and the third partition segment 403 divide the interior of the housing 100 into a first cavity and a second cavity.

[0079] As one feasible implementation, the tank wall of the oil return tank 200 with the oil return hole 201 is the first tank wall, and the first end of the first defoaming part 301 is attached to the first tank wall and abuts against the bottom end of the oil return hole 201.

[0080] The first defoaming part 301 is inclined relative to the first box wall in its extension direction, and the second end of the first defoaming part 301 is inclined away from the first box wall compared to the first end of the first defoaming part 301.

[0081] For example, when the extension direction of the first defoaming section 301 is inclined relative to the first tank wall, and the second end of the first defoaming section 301 is inclined away from the first end of the first defoaming section 301, the oil in the return oil tank 200 overflows through the return oil hole 201. The overflowing oil flows to the first defoaming section 301 that abuts the bottom of the return oil hole 201. The oil flows along the first defoaming section 301 that is inclined relative to the first tank wall. In this way, by extending the flow time of the oil in the first defoaming section 301, the air bubbles in the oil are eliminated.

[0082] As one feasible implementation method, refer to Figure 4 As shown, the surfaces of the first defoaming part 301 and the second defoaming part 302 are provided with a plurality of defoaming holes arranged in an array.

[0083] As one feasible implementation, the surfaces of the first defoaming part 301 and the second defoaming part 302 are provided with a plurality of defoaming protrusions arranged in an array.

[0084] In some embodiments, refer to Figure 1As shown, the direction indicated by the black arrow is the flow direction of the oil in the hydraulic oil tank. The oil in the hydraulic system passes through the return oil filter 500 and the return oil pipe 600 in sequence, and then enters the return oil tank 200. As the oil interface in the return oil tank 200 rises, when the oil interface is level with the bottom of the return oil pipe 600 inside the return oil tank 200, the oil interface continues to rise until it is level with the return oil hole 201. The oil then overflows from the return oil tank 200 through the return oil hole 201 and flows to the upper surface of the first defoaming part 301. It flows towards the second defoaming part through the defoaming holes, and then enters the upper surface of the second defoaming part 302. The oil flows towards the first partition section 401 through the defoaming holes of the second defoaming part. As the oil flows through the first defoaming section 301 and the second defoaming section 302, the first defoaming section 301 continuously defoams the oil, while the second defoaming section 302 performs secondary bubble filtration, ensuring that bubbles are removed from the oil. Subsequently, the oil flows along the first and second baffle sections 402, eventually flowing through the opening in the second baffle section 402 into the suction pipe. The oil receives sufficient heat dissipation during its flow through the first and second baffle sections 402. Furthermore, the oil enters the suction pipe through the opening and then into the hydraulic pump, protecting the various components of the hydraulic system from cavitation and extending their service life.

[0085] In one feasible implementation, the first end of the second defoaming part 302 is connected to the first box wall, and the second end of the second defoaming part 302 extends away from the first box wall and is connected to the second end of the first defoaming part 301.

[0086] The first defoaming section 301, the second defoaming section 302, and part of the first box wall together form a defoaming zone.

[0087] For example, when the oil flows to the first defoaming section 301, the oil comes into contact with the upper surface of the first defoaming section 301, and then moves along the defoaming holes on the first defoaming section 301 toward the second defoaming section 302. When the oil flows to the second defoaming section 302, the oil comes into contact with the upper surface of the second defoaming section 302, and then moves along the defoaming holes of the second defoaming section 302 toward the first partition section 401. In this way, the oil flows between the first defoaming section 301, the second defoaming section 302 and the first tank wall of the return oil tank 200. Therefore, the area enclosed by the first defoaming section 301, the second defoaming section 302 and part of the first tank wall is defined as the defoaming zone.

[0088] For example, the spacing between the defoaming holes on the first defoaming part 301 and the second defoaming part 302 can be 10-15mm, and the diameter of the defoaming holes can be 1-3mm. This ensures that the bubbles can be fully dispersed and diffused, avoids the bubbles from accumulating in local areas, and improves the defoaming effect.

[0089] For example, the spacing between the defoaming holes in the first defoaming part 301 can be 12 mm, and the diameter of the defoaming holes can be 1.5 mm; the spacing between the defoaming holes in the second defoaming part 302 can be 12 mm, and the diameter of the defoaming holes in the second defoaming part 302 can be 1.5 mm.

[0090] In other embodiments, the oil in the hydraulic system passes sequentially through the return oil filter 500 and the return oil pipe 600. As the interface of the oil in the return oil tank 200 rises, when the interface of the oil is flush with the bottom of the return oil pipe 600 inside the return oil tank 200, the interface of the oil continues to rise until it is flush with the return oil hole 201. At this point, the oil overflows from the return oil tank 200 through the return oil hole 201 and flows to the upper surface of the first defoaming section 301. Subsequently, the oil flows along the defoaming protrusions of the first defoaming section 301. When the oil flows to the first partition section 401, it gradually flows along the first partition section 401 to the second partition section 402, and finally flows through the opening to the suction pipe.

[0091] As one feasible implementation, the angle between the extending direction of the first defoaming part 301 and the extending direction of the second defoaming part 302 is greater than or equal to 60° and less than or equal to 80°.

[0092] For example, when the angle between the extending direction of the first defoaming section 301 and the extending direction of the second defoaming section 302 is less than 60°, the angle between the first defoaming section 301 and the first wall of the return oil tank 200 is greater than or equal to 30°. The first defoaming section 301 is relatively flat, and the oil flowing out through the return oil hole 201 flows along the first defoaming section 301. Since the oil has a certain viscosity, when the first defoaming section 301 is relatively flat, the oil will accumulate at the first end of the first defoaming section 301 and flow from the first end of the first defoaming section 301 along the defoaming hole to the defoaming area, thus reducing the flow rate of the oil. Therefore, this application sets the angle between the extending direction of the first defoaming section 301 and the extending direction of the second defoaming section 302 to be greater than or equal to 60° and less than or equal to 80° to ensure that the oil flows fully in the first defoaming section 301, thereby ensuring that the bubbles can be fully dissipated.

[0093] For example, when the angle between the extension direction of the first defoaming section 301 and the extension direction of the second defoaming section 302 is greater than 80°, the angle between the first defoaming section 301 and the first tank wall of the return oil tank 200 is less than 10°. The first defoaming section 301 is relatively steep. The oil flowing out through the return oil hole 201 flows along the first defoaming section 301. Because the first defoaming section 301 is too steep, some oil flows directly into the first cavity without passing through the first defoaming section 301. Since this part of the oil does not pass through the first defoaming section 301, there are still some air bubbles in the oil, and the defoaming effect of the oil is not good. Therefore, this application sets the angle between the extension direction of the first defoaming section 301 and the extension direction of the second defoaming section 302 to be greater than or equal to 60° and less than or equal to 80° to ensure that the oil flows fully in the first defoaming section 301, thereby ensuring that the air bubbles can be fully dissipated.

[0094] Secondly, this application provides a hydraulic system, including a pump body, a return oil line and a suction oil line and a hydraulic oil tank, wherein the return oil line and the return oil filter 500 of the hydraulic oil tank are connected, the suction oil line and the suction port 101 of the hydraulic oil tank are connected, and the pump body is connected to at least one of the suction oil line and the return oil line.

[0095] For example, refer to Figure 1 As shown, the flow direction of the oil body is referenced. Figure 1 As indicated by the black arrow, the oil in the hydraulic system's return oil line passes through the return oil filter 500 and the return oil pipe 600 sequentially into the return oil tank 200 of the hydraulic oil tank. The return oil tank 200 is used to store the oil. As the oil interface in the return oil tank 200 rises, when the oil interface is flush with the bottom of the return oil pipe 600 inside the return oil tank 200, the oil interface continues to rise until it is flush with the return oil hole 201. At this point, the oil overflows from the return oil tank 200 through the return oil hole 201 and flows to the upper surface of the first defoaming section 301. It then flows along the defoaming holes of the first defoaming section 301 to the defoaming zone. Subsequently, the oil enters the upper surface of the second defoaming section 302 and flows through the defoaming holes to the partition 400. As the oil flows through the first defoaming section 301 and the second defoaming section 302, the first defoaming section 301 continuously defoams the oil, and the second defoaming section 302 performs secondary bubble filtration, ensuring that bubbles in the oil are removed. When the oil flows along the baffle 400, it flows along the first baffle section and the second baffle section 402, finally flowing through the opening on the second baffle section 402 to the suction pipe. The oil receives sufficient heat dissipation during its flow through the first and second baffle sections 402. Furthermore, the oil enters the suction pipe through the opening and then flows into the pump body through the hydraulic system's suction line. This process protects the various components of the hydraulic oil tank from cavitation and other effects, extending the service life of each component.

[0096] It is understood that since the hydraulic system of the present invention adopts the technical solution of the above-described hydraulic tank embodiment, it has at least the beneficial effects brought about by the technical solution of the above-described embodiment, which will not be elaborated here.

[0097] In the above description, it should be understood that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal connection of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. The terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In the description of this application, "multiple" means two or more, unless otherwise precisely specified.

[0098] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0099] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A hydraulic oil tank, characterized in that, It includes a housing, an oil return tank, and a defoaming component. The housing includes an oil return port and an oil suction port that communicate with a cavity of the housing. The defoaming component and the oil return tank are disposed in the cavity. The oil return tank is provided with an oil inlet and an oil return hole that communicate with the oil return chamber of the oil return tank. The oil inlet is connected to the oil return hole. The defoaming component is located near the oil return hole. The oil overflowing through the oil return hole flows through the defoaming component to the oil suction port. The defoaming component includes a first defoaming part and a second defoaming part. The first end of the first defoaming part is close to the oil return hole, and the second end of the first defoaming part extends away from the oil return hole and is connected to the second defoaming part. The extension direction of the first defoaming part and the extension direction of the second defoaming part intersect each other. The tank wall with the oil return hole in the oil return tank is the first tank wall, and the first end of the first defoaming part is attached to the first tank wall and abuts against the bottom end of the oil return hole. The first defoaming part extends at an angle relative to the first box wall, and the second end of the first defoaming part is inclined away from the first box wall compared to the first end of the first defoaming part. The first end of the second defoaming part is connected to the first box wall, and the second end of the second defoaming part extends away from the first box wall and is connected to the second end of the first defoaming part. The first defoaming section, the second defoaming section, and part of the first box wall together form a defoaming zone.

2. The hydraulic oil tank according to claim 1, characterized in that, The angle between the extension direction of the first defoaming part and the extension direction of the second defoaming part is greater than or equal to 60° and less than or equal to 80°.

3. The hydraulic oil tank according to claim 1, characterized in that, The surfaces of the first defoaming part and the second defoaming part are provided with a plurality of defoaming holes arranged in an array; And / or, the surfaces of the first defoaming part and the second defoaming part are provided with a plurality of defoaming protrusions arranged in an array.

4. The hydraulic oil tank according to any one of claims 1-3, characterized in that, There are multiple oil return holes and multiple defoaming components. The multiple oil return holes are respectively arranged on two opposite side walls of the oil return tank. The multiple defoaming components and multiple oil return holes are arranged in a one-to-one correspondence. And / or, the oil return hole is located near the top of the oil return tank.

5. The hydraulic oil tank according to any one of claims 1-3, characterized in that, It also includes a partition, which is disposed in the cavity and divides the cavity into a first cavity and a second cavity. The oil return tank and the defoaming component are both located in the first cavity. The partition member includes a first partition section and a second partition section connected to each other. The first partition section extends in a horizontal direction, and the second partition section extends in a vertical direction. The second partition section is located at the bottom of the first partition section. The return oil tank includes a second tank wall located at the bottom of the return oil tank. The first partition section is located at the bottom of the second tank wall and is spaced apart from the second tank wall in the vertical direction. At least a portion of the first partition section corresponds to the second tank wall in the vertical direction. The second cavity is provided with an oil suction pipe that communicates with the oil suction port, and the second partition section has an opening that communicates with the oil suction pipe.

6. The hydraulic oil tank according to any one of claims 1-3, characterized in that, It also includes multiple return oil filters and multiple return oil pipes. At least some of the return oil filters are located outside the housing. The return oil pipes are connected to the return oil filters. The return oil pipes extend into the return oil port and are connected to the return oil tank. The bottom of the return oil pipe inside the return oil tank is lower than the setting height of the return oil hole.

7. The hydraulic oil tank according to any one of claims 1-3, characterized in that, It also includes a liquid level detection element, the detection end of which is located in the cavity, and the liquid level detection element is configured to detect the liquid level of the oil inside the tank; And / or, the hydraulic oil tank further includes a temperature detection element, the detection end of which is located in the cavity, and the temperature detection element is configured to detect the temperature of the oil inside the tank; And / or, the hydraulic tank further includes an air filter, which is in communication with the cavity.

8. A hydraulic system, characterized in that, The system includes a pump body, a return oil line, a suction oil line, and a hydraulic oil tank according to any one of claims 1-7. The return oil line is connected to the return oil filter of the hydraulic oil tank, the suction oil line is connected to the suction port of the hydraulic oil tank, and the pump body is connected to at least one of the suction oil line and the return oil line.

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