A fluid flow straightener

Abstract

The application discloses a kind of fluid rectifying devices, and rectifying device is arranged in oil tank and forms multiple through flow channels in oil return filter element, oil suction filter element;Fluid rectifying device includes: oil return guide plate assembly, oil suction guide plate assembly, oil return flow channel, oil suction flow channel, middle rectifying channel and front rectifying channel;Oil return guide plate assembly is arranged outside oil return filter element, and oil suction guide plate assembly is arranged outside oil suction filter element;Through oil return flow channel is formed between oil return guide plate assembly;Through oil suction flow channel is formed between oil suction guide plate assembly;Oil return guide plate assembly and oil suction guide plate assembly have middle rectifying channel and front rectifying channel that communicate oil return flow channel and oil suction flow channel;The application forms S-shaped through flow cavity in oil tank by oil return flow channel, front rectifying channel, middle rectifying channel, oil suction flow channel, and the fluid medium of oil tank is buffered and filtered, reduce hydraulic system fluid medium pollution and slow impact force.

Description

Technical Field

[0001] This invention belongs to the field of excavator equipment technology, and specifically relates to a fluid rectification device. Background Technology

[0002] In hydraulic systems, the oil tank assembly filters contaminants in the hydraulic fluid medium through the return oil filter element. Therefore, the return oil filter element is one of the important functions of the hydraulic oil tank. Thus, protecting the return oil filter element and effectively settling contaminants are key factors that need to be considered in the design of the oil tank.

[0003] Existing oil tank designs typically employ baffles between the return oil pipe outlet and the return oil filter element to prevent direct flow of fluid and thus avoid filter damage. Furthermore, return oil filters generally have built-in bypass valves to prevent clogging and pressure buildup that could lead to filter deformation and failure. These are common technical solutions for protecting return oil filters from deformation and failure. While baffles prevent direct flow, the outflow angle of the fluid changes, resulting in a significant entry angle that impacts the filter element. The closer to the baffle, the greater the entry angle and the stronger the force, causing torsional forces in the return oil filter element's axial direction and accelerating deformation. Moreover, when the pressure loss reaches the design limit, the bypass valve on the return oil filter element opens, allowing unfiltered fluid to return directly to the oil tank. While this protects the return oil filter element, it also allows unfiltered fluid to enter the tank, accelerating the deterioration of the cleanliness of the internal fluids and hindering contaminant control. Summary of the Invention

[0004] Purpose of the invention: In order to overcome the shortcomings of the prior art, the present invention provides a fluid rectification device, which forms an S-shaped through flow cavity inside the oil tank through the return oil flow channel, the front rectification channel, the middle rectification channel and the suction oil flow channel, to buffer the fluid medium in the flow cavity, reduce the fluid medium velocity and reduce the impact force.

[0005] Technical Solution: In a first aspect, this invention provides a fluid rectification device, based on the aforementioned oil tank, wherein the rectification device is disposed within the oil tank and includes:

[0006] Oil return guide plate assembly and oil suction guide plate assembly;

[0007] The return oil guide plate assemblies form a through return oil flow channel;

[0008] The oil suction guide plate assemblies form a through oil suction flow channel;

[0009] The return oil guide plate assembly and the suction oil guide plate assembly have a middle rectification channel and a front rectification channel that connect the return oil flow channel and the suction oil flow channel;

[0010] The return oil flow channel, front rectifier channel, middle rectifier channel, and suction oil flow channel form an S-shaped through-flow cavity inside the oil tank.

[0011] In a further embodiment, the fuel tank includes: a fuel tank top plate, an outer peripheral plate fixedly connected to the fuel tank top plate, and a fuel tank bottom plate fixedly connected to the bottom of the outer peripheral plate;

[0012] The top plate of the oil tank is connected to a return oil filter element flange plate, a breather valve seat, and an oil suction filter element flange plate.

[0013] An oil suction flange seat is connected to the bottom plate of the oil tank;

[0014] An oil return port is provided on the outer plate;

[0015] The oil tank is equipped with an oil return filter element corresponding to the oil return filter element flange plate and an oil suction filter element corresponding to the oil suction filter element flange plate.

[0016] The return oil guide plate assembly is disposed outside the return oil filter element, and the suction oil guide plate assembly is disposed outside the suction oil filter element.

[0017] In a further embodiment, the oil return guide plate assembly includes: a first oil return guide plate fixedly connected to the top plate of the oil tank and connected to the interior of the outer plate; a second oil return guide plate fixedly connected to the bottom of the first oil return guide plate and connected to the interior of the outer plate; an upper oil return guide cylinder inserted into the second oil return guide plate and coaxially arranged with the oil return filter element; a lower channel bottom plate fixedly connected to the bottom of the upper oil return guide cylinder; an oil return outlet steel pipe fixedly inserted into the lower channel bottom plate; a lower oil return guide cylinder fixedly installed on the bottom plate of the oil tank and fitted outside the upper oil return guide cylinder; and a third oil return guide plate connected to the side of the lower oil return guide cylinder near the oil suction filter element.

[0018] In a further embodiment, the return oil flow channel includes: an upper return oil channel located between the return oil port and the first return oil guide plate, the second return oil guide plate, and the outer plate; a lower return oil channel located inside the upper return oil guide cylinder and connected to the upper return oil channel; and a bottom rectifying channel connected to the lower return oil channel via a return oil outlet steel pipe and located between the lower return oil guide cylinder and the bottom plate of the oil tank.

[0019] In a further embodiment, the diameter of the upper oil return guide cylinder is larger than the diameter of the oil return filter element, and the oil return filter element is installed on the bottom plate of the lower channel to filter the oil return in the lower oil return channel;

[0020] The upper oil return guide cylinder has a first opening at one end near the upper oil return channel, which is used to connect the upper oil return channel and the lower oil return channel.

[0021] The lower return oil guide cylinder has a second opening, and the diameter of the first opening is smaller than the diameter of the second opening to accommodate the upper return oil guide cylinder.

[0022] In a further embodiment, one side of the third oil return guide plate is tangent to the lower oil return guide cylinder, and the other side is fixedly connected to the inner wall of the outer plate to form a front rectification channel; the lower oil return guide cylinder has several through holes on the side near the third oil return guide plate to connect the bottom rectification channel with the front rectification channel.

[0023] In a further embodiment, the oil-absorbing guide plate assembly includes: an oil-absorbing guide straight plate fixedly installed on the bottom plate of the oil tank and encapsulated with the inner side of the outer plate, and an arc-shaped oil-absorbing guide plate integrally connected to one end of the oil-absorbing guide straight plate;

[0024] The oil suction guide plate is a flat plate and is arranged opposite to the third oil return guide plate to form a medium rectification channel;

[0025] The arc-shaped oil-absorbing guide plate is an arc-shaped plate and is coaxially arranged with the oil-absorbing filter element to form an arc-shaped oil-absorbing flow channel.

[0026] In a further embodiment, the arc-shaped oil-absorbing guide plate has a third opening at one end near the top plate of the oil tank for accommodating the oil-absorbing filter element.

[0027] In a further embodiment, the outlet of the oil suction filter element is connected to the oil suction flange seat.

[0028] In a further embodiment, the return oil filter element and the suction oil filter element are placed at 180° opposite each other.

[0029] Beneficial effects: Compared with the prior art, the present invention has the following advantages:

[0030] (1) An S-shaped through-flow cavity is formed inside the oil tank through the return oil flow channel, the front rectification channel, the middle rectification channel and the suction oil flow channel. This buffers the fluid medium inside the flow cavity, reduces the fluid medium flow rate and the impact force, and extends the filtration time of the fluid medium. This keeps most of the contaminants in the fluid medium inside the oil tank and controls the rate of increase of contaminants in the hydraulic system.

[0031] (2) The return oil is rectified by the return oil upper channel in the return oil flow channel of the present invention, so that the injection angle of the fluid medium relative to the surface of the return oil filter element is reduced, thereby making the vertical force acting on the return oil filter element in the axial direction uniform, making it less likely to generate torsional force on the filter element, avoiding its bending deformation failure, and extending its service life.

[0032] (3) After the fluid medium enters the bottom cavity of the return oil channel, it will make a 180-degree turn and flow upward, so that the larger pollutant particles mixed in the return oil will be retained in the cavity under the action of gravity, thus achieving the effect of removing pollutants. Attached Figure Description

[0033] Figure 1 This is a sectional view of the fuel tank assembly structure;

[0034] Figure 2 Cross-sectional view of the rectifier and oil tank;

[0035] Figure 3 for Figure 2 Schematic diagram of the cross-section of AA;

[0036] Figure 4 for Figure 2 Schematic diagram of the cross-section of BB;

[0037] Figure 5 for Figure 2 Schematic diagram of the CC cross section.

[0038] The attached diagram is labeled as follows: 1-Return oil filter element; 2-Oil tank; 3-Return oil filter element end cap; 4-Breaker valve; 5-Suction oil filter element end cap; 6-Suction oil filter element; 001-Upper return oil channel; 002-Lower return oil channel; 003-Bottom rectifier channel; 004-Front rectifier channel; 005-Middle rectifier channel; 006-Suction oil flow channel; 100-First opening; 101-Oil tank top plate; 102-Return oil filter element flange plate; 103-Breaker valve seat; 104-Suction oil filter element flange plate; 105-Outer plate; 106-Oil suction flange seat; 107-Oil tank bottom plate; 200-Second opening; 201-First oil return guide plate; 202-Second oil return guide plate; 203-Upper oil return guide cylinder; 204-Lower channel bottom plate; 205-Oil return outlet steel pipe; 206-Lower oil return guide cylinder; 207-Third oil return guide plate; 208-Oil suction guide straight plate; 209-Oil return port; 300-Third hole; 400-Third opening; 500-Arc-shaped oil suction guide plate. Detailed Implementation

[0039] To better understand the technical content of the present invention, the technical solution of the present invention will be further introduced and explained below with reference to specific embodiments, but is not limited thereto.

[0040] Combination Figure 1 To further explain the fluid rectification device in this embodiment, the rectification device is fixedly installed inside the oil tank 2 and located between the return oil filter element 1 and the suction oil filter element 6; multiple through-flow channels are formed in the return oil filter element 1 and the suction oil filter element 6 to guide the fluid medium entering the oil tank 2.

[0041] In this embodiment, the oil tank 2 includes: an oil tank top plate 101, an outer plate 105, and an oil tank bottom plate 107; the outer plate 105 is fixedly connected to the oil tank top plate 101, and the oil tank bottom plate 107 is fixedly connected to the bottom of the outer plate 105; the oil tank top plate 101 is connected to a return oil filter element flange plate 102, a breather valve seat 103, and an oil suction filter element flange plate 104; the return oil filter element flange plate 102 is adapted to the return oil filter element end cap 3, the breather valve seat 103 is adapted to the breather valve 4, and the oil suction filter element flange plate 104 is adapted to the oil suction filter element 6 end cap 5;

[0042] An oil suction flange seat 106 is connected to the bottom plate 107 of the oil tank for connecting the oil drain steel pipe;

[0043] The outer plate 105 is provided with an oil return port 209 for connecting an oil return steel pipe;

[0044] The oil tank 2 is equipped with an oil return filter element 1 corresponding to the oil return filter element flange plate 102, and an oil suction filter element 6 corresponding to the oil suction filter element flange plate 104. Combined with... Figures 2 to 5 Further explanation: The fluid rectification device in this embodiment includes: a return oil guide plate assembly, an oil suction guide plate assembly, a return oil flow channel, an oil suction flow channel 006, a middle rectification channel 005, and a front rectification channel 004;

[0045] The return oil guide plate assembly is located outside the return oil filter element 1 and is used to guide the return oil entering the oil tank 2 through the return oil port 209. The suction oil guide plate assembly is located outside the suction oil filter element 6 and is used to guide the fluid medium filtered by the return oil filter element 1 back to the suction oil filter element 6. A through return oil flow channel is formed between the return oil guide plate assemblies. A through suction oil flow channel 006 is formed between the suction oil guide plate assemblies. The return oil guide plate assembly and the suction oil guide plate assembly have a middle rectification channel 005 and a front rectification channel 004 that connect the return oil flow channel and the suction oil flow channel 006. The return oil flow channel, the front rectification channel 004, the middle rectification channel 005, and the suction oil flow channel 006 form an S-shaped through flow cavity inside the oil tank 2, which buffers the fluid medium in the flow cavity, reduces the fluid medium flow rate and the impact force, and prolongs the filtration time of the fluid medium, so that most of the contaminants in the fluid medium are retained inside the oil tank 2, thereby controlling the rate of increase of contaminants in the hydraulic system.

[0046] Optionally, the return oil guide plate assembly includes: a first return oil guide plate 201, a second return oil guide plate 202, an upper return oil guide cylinder 203, a lower channel bottom plate 204, a return oil outlet steel pipe 205, a lower return oil guide cylinder 206, and a third return oil guide plate 207.

[0047] The first oil return guide plate 201 is fixedly connected to the top plate 101 of the oil tank and is internally connected to the outer plate 105. The second oil return guide plate 202 is fixedly connected to the bottom of the first oil return guide plate 201 and is internally connected to the outer plate 105. The upper oil return guide cylinder 203 is inserted into the second oil return guide plate 202 and is coaxially arranged with the oil return filter element 1. The lower channel bottom plate 204 is fixedly connected to the bottom of the upper oil return guide cylinder 203. The oil return outlet steel pipe 205 is fixedly inserted into the lower channel bottom plate 204. The lower oil return guide cylinder 206 is fixedly installed on the bottom plate 107 of the oil tank and is fitted outside the upper oil return guide cylinder 203. The third oil return guide plate 207 is connected to the side of the lower oil return guide cylinder 206 near the oil suction filter element 6.

[0048] Optionally, the return oil flow channel includes: upper return oil channel 001, lower return oil channel 002, and bottom rectifier channel 003;

[0049] The upper oil return channel 001 is located between the oil return port 209 and the first oil return guide plate 201, the second oil return guide plate 202, and the outer plate 105. The lower oil return channel 002 is located inside the upper oil return guide cylinder 203 and is connected to the upper oil return channel 001. The bottom rectifier channel 003 is connected to the lower oil return channel 002 through the oil return outlet steel pipe 205 and is located between the lower oil return guide cylinder 206 and the bottom plate 107 of the oil tank.

[0050] Optionally, the diameter of the upper oil return guide cylinder 203 is larger than the diameter of the oil return filter element 1, and it is used to accommodate the oil return filter element 1. The oil return filter element 1 is installed on the lower channel bottom plate 204 and is used to filter the oil return in the lower oil return channel 002. In this embodiment, the upper oil return channel 001 rectifies the oil return, so that the injection angle of the fluid medium relative to the surface of the oil return filter element 1 is reduced, thereby making the vertical force acting on the oil return filter element 1 in the axial direction uniform, making it less likely to generate torsional force on the filter element, avoiding its bending deformation failure, and extending its service life.

[0051] The upper oil return guide cylinder 203 has a first opening 100 at one end near the upper oil return channel 001, which is used to connect the upper oil return channel 001 and the lower oil return channel 002.

[0052] The lower return oil guide cylinder 206 has a second opening 200. The diameter of the first opening 100 is smaller than the diameter of the second opening 200, which is used to accommodate the upper return oil guide cylinder 203 for easy assembly.

[0053] One side of the third return oil guide plate 207 is tangent to the lower return oil guide cylinder 206, and the other side is fixedly connected to the inner wall of the outer plate 105 to form the front rectification channel 004. The lower return oil guide cylinder 206 has several through holes 300 on the side near the third return oil guide plate 207 to connect the bottom rectification channel 003 with the front rectification channel 004. The fluid flowing out of the through holes 300 in the bottom rectification channel 003 is blocked to generate a reaction force. Under the action of the reaction force, the fluid turns from the front rectification channel 004 to the middle rectification channel 005.

[0054] The oil suction guide plate assembly includes: an oil suction guide straight plate 208 and an arc-shaped oil suction guide plate 500;

[0055] The oil suction guide plate 208 is fixedly installed on the bottom plate 107 of the oil tank and encapsulated with the inner side of the outer plate 105. The arc-shaped oil suction guide plate 500 is integrally connected to one end of the oil suction guide plate 208.

[0056] The oil suction guide plate 208 is a flat plate and is arranged opposite to the third oil return guide plate 207 to form the middle rectification channel 005;

[0057] The arc-shaped oil suction guide plate 500 is coaxially arranged with the oil suction filter element 6 to form an arc-shaped oil suction flow channel 006.

[0058] The arc-shaped oil suction guide plate 500 has a third opening 400 at one end near the top plate 101 of the oil tank. The diameter of the third opening 400 is larger than the diameter of the oil suction filter element 6 and is used to accommodate the oil suction filter element 6. The outlet of the oil suction filter element 6 is connected to the oil suction flange seat 106.

[0059] Optionally, the return oil filter element 1 and the suction oil filter element 6 are placed at 180° relative to each other, so that the fluid medium discharged from the return oil filter element 1 makes a 180-degree turn relative to the return oil outlet steel pipe 205 and moves upward. It flows out through the through hole 300 of the lower return oil guide cylinder 206 to the front rectification channel 004, and then enters the middle rectification channel 005 and the suction flow channel 006 in sequence from the front rectification channel 004, and finally enters the suction oil filter element 6. This ensures that the fluid medium between the return oil filter element 1 and the suction oil filter element 6 presents a relatively stable S-shaped 180-degree flow pattern under the intervention of the fluid rectification device.

[0060] Working principle:

[0061] An S-shaped through-flow cavity is formed inside the oil tank 2 through the return oil flow channel, the front rectifier channel 004, the middle rectifier channel 005, and the suction oil flow channel 006. The flow process of the fluid medium in the flow cavity inside the oil tank 2 is as follows: the fluid medium enters the upper return oil channel 001 of the rectifier device of the oil tank 2 through the return oil port 209, and then enters the lower return oil channel 002 of the rectifier device through the first opening 100. After impurities are filtered by the return oil filter element 1, the fluid medium exits through the return oil outlet steel pipe 205 set at the outlet of the return oil filter element 1. The fluid medium flows out and directly enters the bottom rectification channel 003; then the fluid medium makes a 180-degree turn relative to the return oil outlet steel pipe 205 and moves upward, flowing out through the through hole 400300 of the lower return oil guide cylinder 206 to the front rectification channel 004. From the front rectification channel 004, it enters the middle rectification channel 005 and the oil suction channel 006 in sequence, and enters the oil suction filter element 6. After being filtered again by the oil suction filter element 6, the fluid medium is discharged from the oil tank 2 through the oil suction flange seat 106 on the bottom plate 107 of the oil tank.

[0062] In summary, the upper return oil channel 001 in the return oil flow channel of this invention rectifies the return oil, making the injection angle of the fluid medium relative to the surface of the return oil filter element 1 smaller, thereby making the vertical force acting on the return oil filter element 1 in the axial direction uniform, less likely to generate torsional force on the filter element, avoiding its bending deformation failure, and extending its service life; secondly, after the fluid medium enters the bottom cavity of the lower return oil channel 002, it will make a 180-degree turn and flow upward, so that larger contaminant particles mixed in the return oil will be retained in the cavity under the action of gravity, achieving the effect of removing contaminants; finally, through the return oil flow channel, the front rectification channel 004, the middle rectification channel 005, and the suction flow channel 006, an S-shaped through flow cavity is formed inside the oil tank 2, which buffers the fluid medium in the flow cavity, reduces the fluid medium flow rate and reduces the impact force, and extends the filtration time of the fluid medium, so that most of the contaminants in the fluid medium are retained inside the oil tank 2, controlling the rate of increase of contaminants in the hydraulic system.

[0063] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A fluid rectification device, characterized in that, The rectifier is disposed inside the fuel tank and includes: Oil return guide plate assembly and oil suction guide plate assembly; The return oil guide plate assemblies form a through return oil flow channel; The oil suction guide plate assemblies form a through oil suction flow channel; The return oil guide plate assembly and the suction oil guide plate assembly have a middle rectification channel and a front rectification channel that connect the return oil flow channel and the suction oil flow channel; The return oil flow channel, the front rectifier channel, the middle rectifier channel, and the suction oil flow channel form an S-shaped through flow cavity inside the oil tank; The fuel tank includes: a fuel tank top plate, an outer plate fixedly connected to the fuel tank top plate, and a fuel tank bottom plate fixedly connected to the bottom of the outer plate; The top plate of the oil tank is connected to a return oil filter element flange plate, a breather valve seat, and an oil suction filter element flange plate. An oil suction flange seat is connected to the bottom plate of the oil tank; An oil return port is provided on the outer plate; The oil tank is equipped with an oil return filter element corresponding to the oil return filter element flange plate and an oil suction filter element corresponding to the oil suction filter element flange plate. The return oil guide plate assembly is disposed outside the return oil filter element, and the suction oil guide plate assembly is disposed outside the suction oil filter element; The oil return guide plate assembly includes: a first oil return guide plate fixedly connected to the top plate of the oil tank and connected to the interior of the outer plate; a second oil return guide plate fixedly connected to the bottom of the first oil return guide plate and connected to the interior of the outer plate; an upper oil return guide cylinder inserted into the second oil return guide plate and coaxially arranged with the oil return filter element; a lower channel bottom plate fixedly connected to the bottom of the upper oil return guide cylinder; an oil return outlet steel pipe fixedly inserted into the lower channel bottom plate; a lower oil return guide cylinder fixedly installed on the bottom plate of the oil tank and fitted outside the upper oil return guide cylinder; and a third oil return guide plate connected to the side of the lower oil return guide cylinder near the oil suction filter element.

2. The fluid rectification device according to claim 1, characterized in that, The return oil flow channel includes: an upper return oil channel located between the return oil port and the first return oil guide plate, the second return oil guide plate, and the outer plate; a lower return oil channel located inside the upper return oil guide cylinder and connected to the upper return oil channel; and a bottom rectifier channel connected to the lower return oil channel via a return oil outlet steel pipe and located between the lower return oil guide cylinder and the bottom plate of the oil tank.

3. The fluid rectification device according to claim 1, characterized in that, The diameter of the upper oil return guide cylinder is larger than the diameter of the oil return filter element. The oil return filter element is installed on the bottom plate of the lower channel and is used to filter the oil return in the lower oil return channel. The upper oil return guide cylinder has a first opening at one end near the upper oil return channel, which is used to connect the upper oil return channel and the lower oil return channel. The lower return oil guide cylinder has a second opening, and the diameter of the first opening is smaller than the diameter of the second opening to accommodate the upper return oil guide cylinder.

4. The fluid rectification device according to claim 1, characterized in that, One side of the third oil return guide plate is tangent to the lower oil return guide cylinder, and the other side is fixedly connected to the inner wall of the outer plate to form a front rectification channel; the lower oil return guide cylinder has several through holes on the side near the third oil return guide plate to connect the bottom rectification channel with the front rectification channel.

5. A fluid rectification device according to claim 4, characterized in that, The oil-absorbing guide plate assembly includes: an oil-absorbing guide plate fixedly installed on the bottom plate of the oil tank and encapsulated with the inner side of the outer plate, and an arc-shaped oil-absorbing guide plate integrally connected to one end of the oil-absorbing guide plate. The oil suction guide plate is a flat plate and is arranged opposite to the third oil return guide plate to form a medium rectification channel; The arc-shaped oil-absorbing guide plate is an arc-shaped plate and is coaxially arranged with the oil-absorbing filter element to form an arc-shaped oil-absorbing flow channel.

6. A fluid rectification device according to claim 5, characterized in that, The arc-shaped oil-absorbing guide plate has a third opening at one end near the top plate of the oil tank for accommodating the oil-absorbing filter element.

7. A fluid rectification device according to claim 1, characterized in that, The outlet of the oil suction filter element is connected to the oil suction flange seat.

8. A fluid rectification device according to claim 1, characterized in that, The return oil filter element and the suction oil filter element are placed at 180° to each other.

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