Oil tank for aluminum profile extruder

Abstract

The application discloses an oil tank for an aluminum profile extruding machine, which comprises a tank body and a separation component arranged in the tank body; the separation component defines a meandering flow channel in the tank body, and an oil inlet and an oil outlet are respectively arranged at two ends of the flow channel; the separation component is provided with an oil passing hole below a liquid level, which prevents the upper layer of oil containing bubbles from flowing to the oil outlet. The meandering three-section flow channel is formed by the separation component, the local short cycle of oil return and oil absorption is cut off, the dead oil area of the oil tank is eliminated, and the hydraulic oil loss is reduced; the submerged side flow oil outlet pipe buffers high-speed oil return and reduces air entrainment of the oil; the cavities are communicated only through the oil passing hole below the liquid level, so that the cavitation caused by the bubble oil absorbed into the hydraulic system is avoided; the buoyancy driven movable baffle is additionally arranged, the oil passing flow area can be self-adaptively adjusted according to the liquid level, the stable degassing and isolation effects are maintained under high and low liquid levels, the operation stability of the hydraulic system of the extruding machine is effectively improved, the service life of the hydraulic components is prolonged, and the equipment operation and maintenance cost is reduced.

Description

Technical Field

[0001] This invention belongs to the field of oil tank technology, specifically relating to an oil tank for an aluminum profile extrusion press. Background Technology

[0002] The main cylinder of an aluminum profile extrusion press is typically large. To meet the fluid filling requirements during rapid piston feed, the equipment is generally equipped with a large-capacity oil tank. This oil tank not only supplies oil during the forward movement of the main cylinder and stores oil during piston retraction, but also provides an oil suction source for the pump station.

[0003] In some existing extruders, the oil tank typically only has ribs for structural reinforcement, and the main cylinder return oil pipe mostly uses a straight-through pipe structure. Due to the overall layout of the extruder, the main cylinder return oil port and the pump station suction port are located relatively close to each other inside the oil tank.

[0004] In actual operation, after the master cylinder piston completes the extrusion action, it needs to return quickly. At this time, the hydraulic oil in the master cylinder will flow back to the oil tank through the return pipe at a high velocity (usually above 8 m / s). Because the traditional return pipe is a straight pipe structure extending vertically upwards, the high-speed returning oil still maintains a high initial upward velocity at the outlet, causing the oil to tumble violently and even splash within the oil tank. This not only causes a large amount of air to mix into the oil, forming air bubbles, but also, because the distance between the return port and the suction port is too close, coupled with the lack of effective flow field guidance inside the oil tank, the air bubbles are easily sucked directly into the pump station's suction pipe. After the hydraulic oil containing air bubbles enters the hydraulic system, its elastic modulus is significantly reduced, leading to a sluggish system response and affecting equipment performance. More seriously, when the system pressure increases, the air bubbles in the oil are compressed and burst, causing cavitation. This can lead to oil oxidation and blackening, or even corrosion and damage to hydraulic components, significantly shortening the service life of the equipment.

[0005] Furthermore, since most existing oil tanks have a single-cavity structure and lack physical barriers between the return and suction paths, based on fluid dynamics, the oil tends to circulate briefly between the return and suction ports along the path of least resistance. This results in a large area within the tank becoming a "dead oil zone," where the hydraulic oil remains stagnant or flows at low speeds for extended periods, unable to participate in system circulation. This phenomenon means that only a very small portion of the total tank capacity actually circulates, accelerating the aging and deterioration of the hydraulic oil in certain areas. Moreover, when changing the oil, a large amount of underutilized "dead oil" is forced to be discharged, causing significant resource waste. Summary of the Invention

[0006] The purpose of this invention is to provide an oil tank for an aluminum profile extrusion press that does not have at least one of the disadvantages mentioned above.

[0007] To achieve the above objectives, the present invention discloses an oil tank for an aluminum profile extrusion press, comprising a tank body and a partition member disposed within the tank body; The separating member defines a meandering flow channel within the housing. The housing is provided with an oil inlet and an oil outlet, which are located at opposite ends of the flow channel. The partition component is also provided with an oil passage hole for connecting the internal space of the flow channel. The oil passage hole is located below the hydraulic oil level in the tank to prevent the upper hydraulic oil from flowing to the oil outlet.

[0008] As an optional implementation, an oil inlet pipe is provided at the oil inlet, the top of the oil inlet pipe is closed, and a plurality of oil inlet holes are opened on the side wall of the oil inlet pipe, the oil inlet holes being immersed in hydraulic oil.

[0009] As an optional implementation, there is a clearance between the bottom of the oil inlet and the bottom of the oil tank to prevent hydraulic oil deposits from rolling over.

[0010] As an optional implementation, the flow channel includes an oil inlet chamber, a buffer oil chamber, and an oil outlet chamber connected in sequence, with the oil inlet located in the oil inlet chamber, the oil outlet located in the oil outlet chamber, and the oil inlet chamber and the buffer oil chamber located on the same side of the oil inlet chamber; The oil inlet chamber and the buffer oil chamber, as well as the buffer oil chamber and the oil outlet chamber, are all connected through the oil passage hole.

[0011] As an optional implementation, the separating member includes a first separating plate and a second separating plate that are perpendicular to each other; One end of the first partition plate is connected to the housing, and the other end is connected to the second partition plate. The oil inlet chamber and the buffer oil chamber are located on both sides of the first partition plate, respectively. Both ends of the second partition plate are connected to the oil tank. The oil inlet chamber and the buffer oil chamber are located on the same side of the second partition plate, and the oil outlet chamber is located on the other side of the second partition plate. The oil passage hole is provided at the end of the first partition plate away from the second partition plate.

[0012] As an optional implementation, the top of both the first partition plate and the second partition plate is provided with several connecting holes to achieve stable air pressure between the chambers.

[0013] As an optional implementation, a movable baffle is slidably connected to the separating member, and a float is connected to the movable baffle; the float is configured to move the movable baffle as the liquid level rises or falls, so as to adjust the flow area of ​​the oil passage hole and keep the flow area of ​​the oil passage hole always lower than the liquid level of the hydraulic oil.

[0014] As an optional implementation, during the movement of the movable baffle as the liquid level rises and falls, a distance of 100mm to 150mm is always maintained between the top of the flow area of ​​the oil passage and the surface of the hydraulic oil.

[0015] As an optional implementation, two guide rods are fixedly connected to the partition member, and the movable baffle is slidably connected to the guide rods.

[0016] As an optional implementation, there is a barrier gap between the bottom of the oil passage and the bottom of the oil tank to prevent hydraulic oil deposits from flowing into the oil passage.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention constructs a flow channel inside the tank by means of a partition component, which forces the return oil to flow along the long flow channel, avoids the situation of local short circulation at the return oil port and the oil suction port, eliminates the large area of ​​dead oil in the oil tank, and allows most of the hydraulic oil inside the oil tank to participate in the system circulation, slows down the local aging of hydraulic oil, and eliminates the need to drain the dead oil that has been left to stand during oil change, which greatly saves hydraulic oil and reduces operation and maintenance costs; at the same time, the partition component has an oil passage hole below the liquid surface, which can block the upper layer of oil containing air bubbles from flowing to the oil outlet, and avoid the damage caused by air bubble oil being sucked into the hydraulic system, such as cavitation and system response delay. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a top view of the internal structure of the present invention; Figure 2 This is a front view schematic diagram of the internal structure of the present invention.

[0020] Explanation of key figure labels: 1. Flow channel; 11. Oil inlet chamber; 12. Buffer oil chamber; 13. Oil outlet chamber; 2. Housing; 3. Separating component; 31. Second separator plate; 32. First separator plate; 4. Oil inlet; 5. Oil outlet; 6. Oil inlet pipe; 61. Oil inlet hole; 7. Through hole; 8. Connecting hole; 9. Movable baffle; 91. Float; 92. Guide rod. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing the invention and its embodiments, and are not intended to limit the indicated device, element, or component to include a specific orientation, or to be constructed and operated in a specific orientation.

[0023] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in certain situations to indicate a dependency or connection. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0024] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0025] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0026] The technical solution of the present invention will be further described below with reference to the embodiments and accompanying drawings.

[0027] Please see Figure 1-2As shown, this application embodiment provides an oil tank for an aluminum profile extrusion press, including a tank body 2 and a partition member 3 disposed within the tank body 2. The partition member 3 encloses and forms a meandering flow channel 1 inside the tank body 2. The tank body 2 is provided with an oil inlet 4 and an oil outlet 5, which are located at the beginning and end of the meandering flow channel 1, respectively, thereby changing the traditional oil tank's short-distance direct flow field structure for oil inlet and outlet. Oil passage holes 7 are provided on the partition member 3 to connect the various sections of the flow channel 1. All oil passage holes 7 are located below the hydraulic oil surface inside the tank body 2. Because the aerated oil formed by the high-speed return oil impact and tumbling of the main cylinder contains a large amount of air, its overall density is lower than that of pure hydraulic oil, causing it to float in the upper oil layer of the tank. Therefore, this embodiment arranges all the oil passage holes 7 below the hydraulic oil surface, so that the top of the oil passage holes 7 is lower than the highest hydraulic oil surface during normal operation of the tank, thereby forming a physical barrier structure. In this way, the upper layer of bubble oil generated during the return process cannot flow to the next chamber through the oil passage 7, but can only remain in the current flow channel 1 area, allowing the bubbles sufficient time to overflow upwards and complete gas-liquid separation. This effectively prevents bubble-laden oil from entering the subsequent hydraulic circuit and solves problems such as cavitation and lag in the hydraulic system.

[0028] Meanwhile, in this embodiment, the meandering flow channel 1 planned by the partition component 3 completely covers the entire internal space of the oil tank, with no blind spots or dead zones. The hydraulic oil entering the flow channel 1 flows along a preset meandering path through the entire area of ​​the tank 2, fully traversing all positions inside the oil tank before flowing out from the outlet 5 and supplying the hydraulic pump station. Through this optimized flow channel 1 structure, the hydraulic oil returning from the main cylinder return pipe is no longer limited to a short-distance circulation between the return port and the suction port, but is forced to flow through the entire area of ​​the oil tank, eliminating the large dead oil areas present in traditional oil tanks, allowing most of the hydraulic oil inside the tank to participate in the dynamic circulation of the system. This structure improves the overall utilization rate of the hydraulic oil inside the tank, avoids long-term stagnation and aging of local oil, and effectively slows down the oxidation and degradation rate of the hydraulic oil.

[0029] While ensuring hydraulic oil circulation and equipment performance, improved oil utilization can reduce the redundant design volume of the oil tank, eliminating the need to increase tank size to accommodate dead oil areas. This reduces the total amount of hydraulic oil needed for the entire hydraulic system, thereby lowering oil procurement and daily maintenance costs. Simultaneously, it avoids the problem of large amounts of underutilized dead oil being forced to be discharged during traditional oil tank changes, reducing waste oil generation and waste fluid treatment costs.

[0030] Furthermore, for the flow channel 1, which completely covers the entire internal space of the oil tank, this embodiment divides the flow channel 1 into three sequentially connected chamber areas: an inlet chamber 11, a buffer chamber 12, and an outlet chamber 13. The inlet port 4 corresponds to the main cylinder return oil pipeline and is located inside the inlet chamber 11. All equipment return oil first flows into the inlet chamber 11, completing the initial oil collection. The outlet port 5 corresponds to the hydraulic pump station suction oil pipeline and is located inside the outlet chamber 13. The pure hydraulic oil, after undergoing stabilization and degassing treatment, finally converges in the outlet chamber 13, providing continuous oil supply to the hydraulic system. In terms of overall layout, the inlet chamber 11 and the buffer chamber 12 are located on the same side of the second partition plate 31, forming a centralized return oil buffer degassing area. The outlet chamber 13 is independently separated, achieving physical isolation between the return oil degassing area and the suction oil supply area. Meanwhile, oil passage holes 7 are provided at the cavity connection positions between the oil inlet cavity 11 and the buffer oil cavity 12, and between the buffer oil cavity 12 and the oil outlet cavity 13. Each oil passage hole 7 is arranged below the liquid surface to ensure that the hydraulic oil can only flow across the cavity through the lower pure oil area, and complete the stabilization, degassing and purification treatment step by step. In terms of specific structure, the partition component 3 is composed of a first partition plate 32 and a second partition plate 31 arranged perpendicularly to each other. One end of the first partition plate 32 is fixedly connected to the inner wall of the box 2, and the other end is fixedly connected to the second partition plate 31 perpendicularly. Through the partitioning effect of the first partition plate 32, the oil inlet cavity 11 and the buffer oil cavity 12 are respectively enclosed on both sides. Both ends of the second partition plate 31 are fixedly connected to the inner wall of the box 2, realizing the complete partitioning of the internal space of the box 2. The oil inlet cavity 11 and the buffer oil cavity 12 are uniformly divided to the same side of the second partition plate 31, and the oil outlet cavity 13 is isolated on the other side of the second partition plate 31, thus structurally avoiding short-path crossflow between the return oil area and the suction oil area. An oil passage hole 7 is provided at the end of the first partition plate 32 away from the second partition plate 31. This position maximizes the buffering stroke of the oil flow within the single cavity, ensuring that the oil has sufficient time to settle, degas, and settle impurities. Simultaneously, the oil inlet 4 is located on the side of the oil inlet cavity 11 near the second partition plate 31. This allows high-speed return oil entering the oil inlet cavity 11 to travel completely around the oil passage hole 7 at the end of the first partition plate 32 before flowing into the buffer oil cavity 12. This further lengthens the oil flow path, reduces the oil flow velocity, and enhances the full-area circulation effect of the flow channel 1, thereby eliminating dead oil zones inside the oil tank and simultaneously improving degassing, flow stabilization, and oil recycling rates.

[0031] The tops of both the first partition plate 32 and the second partition plate 31 are provided with several connecting holes 8, each of which is located in the gas phase region above the hydraulic oil surface in the tank. In this embodiment, the tank interior is divided into independent inlet chambers 11, buffer chambers 12, and outlet chambers 13 by the partition components 3. Under the condition of dynamic circulation and real-time changes in hydraulic oil flow, these chambers are prone to internal pressure differences due to variations in inlet and outlet flow rates and oil velocity. This can lead to problems such as negative pressure suction, pressure stagnation, and uneven liquid levels, indirectly exacerbating the oil entrainment phenomenon and affecting normal oil flow and degassing. Therefore, this embodiment provides connecting holes 8 at the top of the two partition plates to interconnect the gas phase spaces above each independent chamber, achieving real-time pressure balance and uniformity throughout the tank. This effectively eliminates pressure differences between chambers, prevents negative pressure environments in a single chamber from drawing in outside air or entraining air from the liquid surface, and further reduces the gas content of the hydraulic oil. Meanwhile, the pressure equalization structure can ensure that the liquid surface in each cavity remains flat and stable, avoiding violent fluctuations and turbulent rolling of the local liquid surface due to pressure differences. It provides a stable flow field environment for the lower layer of oil to settle and degas, and for impurities to settle, further improving the overall flow stabilization and defoaming performance of the oil tank and the operational stability of the hydraulic system.

[0032] In other embodiments, an oil inlet pipe 6 is installed at the oil inlet 4 to connect to the high-speed return oil pipeline of the main cylinder. The oil inlet pipe 6 adopts a completely closed top structure, abandoning the traditional straight-through open return oil structure, so that the returned oil will not spray upwards, avoiding the generation of a large amount of air bubbles due to violent contact between hydraulic oil and air. Several oil inlet holes 61 of the same specification are evenly opened on the annular sidewall of the oil inlet pipe 6. All oil inlet holes 61 are completely submerged below the hydraulic oil surface inside the oil tank, so that the high-speed hydraulic oil returning from the main cylinder no longer rushes upwards to the oil surface, but can only flow and release pressure laterally in all directions through the oil inlet holes 61 arranged around the sidewall, reducing the return oil flow rate, avoiding violent turbulence and agitation of the oil surface, thereby reducing air entrainment and air bubble generation, and helping to improve the overall degassing effect of the oil tank.

[0033] A pre-set clearance distance of a certain height is reserved between the bottom edge of the oil inlet 61 and the bottom inner wall of the oil tank. During long-term operation of the aluminum profile extrusion press, sludge, oxide impurities, and other deposits will accumulate inside the hydraulic oil and accumulate at the bottom of the oil tank. This clearance distance effectively prevents the hydraulic oil flowing out from the side wall from scouring and disturbing the deposits at the bottom of the oil tank, preventing bottom impurities from rolling, suspending, and mixing into the circulating oil. This ensures the cleanliness of the hydraulic oil and prevents impurities from entering the hydraulic system with the oil, causing pump wear, valve jamming, oil circuit blockage, and other malfunctions, thereby improving the stability and service life of the hydraulic system. Furthermore, a certain height of barrier clearance is reserved between the bottom of the oil passage 7 and the bottom of the oil tank. This clearance structure forms a physical isolation protective zone between the bottom of the oil tank and the flow area of ​​the oil passage 7, preventing impurities, sludge, metal powder, and other contaminants deposited at the bottom of the oil tank from entering the downstream oil circuit with the oil flow.

[0034] In other embodiments, to adapt to the dynamic fluctuations in the oil tank level under different operating conditions of the aluminum profile extrusion press, this embodiment has a movable baffle 9 that can slide up and down on the partition component 3. A float 91 is fixedly mounted on the outside of the movable baffle 9. The float 91 can float on the surface of the hydraulic oil and can sense changes in the oil level inside the tank in real time. Relying on the physical characteristic that buoyancy changes synchronously with the oil level, the float 91 can automatically drive the movable baffle 9 to move up and down as the oil level in the tank rises or falls, dynamically blocking or exposing the flow area of ​​the oil passage 7, thereby adaptively adjusting the effective flow cross-sectional area of ​​the oil passage 7 in real time. Under conditions where the main cylinder rapidly fills and causes a sudden drop in liquid level, the movable baffle 9 moves downward to reduce the flow area of ​​the oil passage 7, thereby avoiding the risk of the oil passage 7 being exposed due to liquid level fluctuations and the direct flow of upper layer bubble oil, ensuring a stable and reliable stratified degassing effect under all working conditions. At the same time, under the working conditions where the aluminum profile extrusion press completes the extrusion process and the main cylinder rapidly returns, the system will generate a sudden large flow rate of high-speed return oil. In a short period of time, a large amount of hydraulic oil will rush into the oil inlet chamber 11, which can easily cause a sudden rise in the liquid level of the oil inlet chamber 11 and a sudden increase in the oil pressure inside the chamber. At this time, the buoyancy component floating on the liquid surface rises rapidly in sync with the liquid level, automatically driving the movable baffle 9 to slide upward along the guide rod 92, gradually increasing the effective flow area of ​​the oil passage 7, matching the flow demand of the large flow rate of return oil in real time, effectively improving the oil exchange rate between chambers, avoiding the rapid accumulation and pressure stagnation of hydraulic oil inside the oil inlet chamber 11, preventing the problem of excessive instantaneous return oil flow causing oil turbulence and violent surface surging, and further suppressing the generation of bubbles.

[0035] Two parallel guide rods 92 are fixedly installed on the partition component 3. The two guide rods 92 are arranged vertically. The movable baffle 9 has corresponding sliding sleeve holes that match the guide rods 92, so that the movable baffle 9 slides vertically along the guide rods 92 throughout the entire process. This effectively limits abnormal situations such as left and right deviation and tilt jamming, improves the operational stability and service life of the adaptive adjustment structure, and ensures long-term maintenance-free and reliable operation of the mechanism.

[0036] Furthermore, this embodiment, by changing the size and material of the float 91, ensures that a constant buffer distance of 100mm to 150mm is maintained between the top of the effective flow area of ​​the oil passage 7 and the real-time hydraulic oil surface during the adjustment of the movable baffle 9 according to the rise and fall of the oil tank level. This buffer distance represents the optimal degassing layer thickness, preventing the turbulent area of ​​the liquid surface from flowing into the oil passage 7 and avoiding air bubbles from flowing across the cavity with the oil. If the distance is too small, fluctuations in the liquid level can easily cause the upper layer of turbulent, foamy oil to enter the flow area, resulting in incomplete degassing; if the distance is too large, it will limit the effective flow area of ​​the oil passage 7, affecting the oil circulation efficiency. This embodiment, by limiting the safe distance to 100mm to 150mm, ensures efficient degassing and defoaming effects while also considering the hydraulic oil circulation flow rate and system oil supply efficiency.

[0037] The technical means disclosed in this invention are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications are also considered within the scope of protection of this invention.

Claims

1. An oil tank for an aluminum profile extrusion press, characterized in that, Includes a housing (2) and a partition member (3) disposed within the housing (2); The separating member (3) defines a meandering flow channel (1) within the box (2). The box (2) is provided with an oil inlet (4) and an oil outlet (5), which are located at the two ends of the flow channel (1), respectively. The partition member (3) is also provided with an oil passage hole (7) for connecting the internal space of the flow channel (1). The oil passage hole (7) is located below the hydraulic oil level in the box (2) to prevent the upper hydraulic oil from flowing to the oil outlet (5).

2. The oil tank for an aluminum profile extrusion press according to claim 1, characterized in that, An oil inlet pipe (6) is provided at the oil inlet (4). The top of the oil inlet pipe (6) is closed. Several oil inlet holes (61) are opened on the side wall of the oil inlet pipe (6). The oil inlet holes (61) are immersed in hydraulic oil.

3. The oil tank for an aluminum profile extrusion press according to claim 2, characterized in that, There is a clearance between the bottom of the oil inlet (61) and the bottom of the oil tank to prevent hydraulic oil deposits from rolling over.

4. The oil tank for an aluminum profile extrusion press according to claim 1, characterized in that, The flow channel (1) includes an oil inlet chamber (11), a buffer oil chamber (12), and an oil outlet chamber (13) connected in sequence. The oil inlet (4) is located in the oil inlet chamber (11), and the oil outlet (5) is located in the oil outlet chamber (13). The oil inlet chamber (11) and the buffer oil chamber (12) are located on the same side of the oil inlet chamber (11). The oil inlet chamber (11) and the buffer oil chamber (12), and the buffer oil chamber (12) and the oil outlet chamber (13) are all connected through the oil passage (7).

5. The oil tank for an aluminum profile extrusion press according to claim 4, characterized in that, The partition component (3) includes a first partition plate (32) and a second partition plate (31) that are perpendicular to each other; one end of the first partition plate (32) is connected to the housing (2), and the other end is connected to the second partition plate (31); the oil inlet chamber (11) and the buffer oil chamber (12) are located on both sides of the first partition plate (32); both ends of the second partition plate (31) are connected to the oil tank; the oil inlet chamber (11) and the buffer oil chamber (12) are located on the same side of the second partition plate (31), and the oil outlet chamber (13) is located on the other side of the second partition plate (31); the oil passage hole (7) is provided at the end of the first partition plate (32) away from the second partition plate (31).

6. The oil tank for an aluminum profile extrusion press according to claim 5, characterized in that, The top of the first partition plate (32) and the second partition plate (31) are provided with several connecting holes (8) to achieve stable air pressure between the chambers.

7. The oil tank for an aluminum profile extrusion press according to any one of claims 1-6, characterized in that, A movable baffle (9) is slidably connected to the partition member (3), and a float (91) is connected to the movable baffle (9). The float (91) is configured to move the movable baffle (9) as the liquid level rises and falls, so as to adjust the flow area of ​​the oil passage (7) and keep the flow area of ​​the oil passage (7) always lower than the liquid level of the hydraulic oil.

8. The oil tank for an aluminum profile extrusion press according to claim 7, characterized in that, During the movement of the movable baffle (9) as the liquid level rises and falls, the top of the flow area of ​​the oil passage (7) and the surface of the hydraulic oil are always kept at a distance of 100mm to 150mm.

9. The oil tank for an aluminum profile extrusion press according to claim 7, characterized in that, Two guide rods (92) are fixedly connected to the partition member (3), and the movable baffle (9) is slidably connected to the guide rods (92).

10. The oil tank for an aluminum profile extrusion press according to any one of claims 1-6, characterized in that, There is a barrier gap between the bottom of the oil passage (7) and the bottom of the oil tank to prevent hydraulic oil deposits from flowing into the oil passage (7).

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