A defoaming oil tank

Abstract

The utility model discloses a kind of defoaming oil tank, including tank, degassing plate and electric heating device are equipped in tank, degassing plate separates the upper defoaming cavity and lower defoaming cavity in tank;Degassing plate includes horizontal plate and inclined plate;Wherein, horizontal plate right end is connected with tank right side, front end is connected with tank front side, rear end is connected with tank rear side;Inclined plate right end is higher than left end, its right end is connected with horizontal plate left end, front end is connected with tank front side, rear end is connected with tank rear side, and inclined plate left end and tank left side are reserved interval, form the communicating port of making upper defoaming cavity and lower defoaming cavity intercommunication;Lower defoaming cavity stores lubricating oil, and lubricating oil liquid level and horizontal plate lower surface exist interval, and inclined plate left end, electric heating device are all below lubricating oil liquid level;Oil return port and oil pump suction inlet are set up on tank, oil return port is connected with upper defoaming cavity and close to tank right side.The oil tank of the utility model can actively eliminate the bubble in oil.

Description

Technical Field

[0001] This utility model relates to a lubricating oil system, and in particular to an antifoaming oil tank. Background Technology

[0002] When a lubricating oil system operates in an atmospheric environment, gas inevitably mixes into the lubricating oil. This gas may dissolve in the oil or separate into suspended bubbles when pressure decreases or temperature increases. These suspended bubbles can cause multiple problems for the system: First, they can induce cavitation, exacerbating the erosion and damage of component surfaces, while also causing strong vibrations and noise. Second, oxygen in the air can accelerate the oxidation and deterioration of the oil, leading to decreased lubrication performance, increased acid value, and more deposits. Third, bubbles can disrupt the oil film between friction pairs, significantly accelerating bearing wear. Fourth, bubbles increase the compressibility of the oil, not only consuming extra energy during the compression process but also causing abnormally high oil temperatures, severely affecting the reliability of the system and the service life of the oil pump.

[0003] As a core component of the system, the lubricating oil tank plays a crucial role in storing oil, dissipating heat, and separating air and impurities from the oil. Its design directly affects the air-impurity separation effect, thus influencing the degree to which the aforementioned hazards are mitigated. Existing hydraulic oil tanks, such as those disclosed in Chinese Utility Model Patent No. CN212028208U, isolate the return oil chamber using an anti-foaming plate. The gap between the anti-foaming plate and the inner wall of the tank guides the return oil to flow along the wall surface, reducing air bubbles generated by the return oil impact and allowing impurities to be deposited by a dirt-separating plate. However, this oil tank relies solely on the gap for passive flow guidance and anti-foaming, failing to actively eliminate existing suspended air bubbles in the oil. The bubble removal effect is limited, and it remains difficult to effectively avoid the aforementioned hazards.

[0004] Therefore, it is particularly necessary to design an oil tank that can actively eliminate air bubbles in the oil to address this problem. Utility Model Content

[0005] The purpose of this invention is to provide an antifoaming oil tank that can actively eliminate air bubbles in oil, addressing the problems mentioned above.

[0006] The technical solution adopted in this utility model is as follows: A defoaming oil tank includes a tank body, wherein a degassing plate and an electric heating device are provided inside the tank body, and the degassing plate divides the interior of the tank body into an upper defoaming chamber and a lower defoaming chamber. The degassing plate includes a horizontal plate and an inclined plate; wherein, the right end of the horizontal plate is connected to the right side of the box, the front end is connected to the front side of the box, and the rear end is connected to the rear side of the box. The right end of the inclined plate is higher than the left end. Its right end is connected to the left end of the horizontal plate, its front end is connected to the front side of the box, and its rear end is connected to the rear side of the box. A gap is reserved between the left end of the inclined plate and the left side of the box to form a connection port that connects the upper defoaming chamber and the lower defoaming chamber. The lower defoaming chamber stores lubricating oil, and there is a gap between the lubricating oil level and the lower surface of the horizontal plate. The left end of the inclined plate and the electric heating device are both located below the lubricating oil level. The housing is provided with an oil return port and an oil pump suction port. The oil return port is connected to the upper defoaming chamber and is located near the right side of the housing. The oil pump suction port is connected to the lower defoaming chamber.

[0007] Furthermore, the electric heating device is located near the bottom of the lower defoaming chamber, and there is a gap between it and the bottom of the lower defoaming chamber.

[0008] Furthermore, in the horizontal direction of the lower defoaming chamber, the electric heating device is located in the middle of the lower defoaming chamber.

[0009] Furthermore, the oil return port is located on the right side of the housing; the oil pump suction port is located on the right side of the housing, and is close to the bottom of the lower defoaming chamber.

[0010] Furthermore, the bottom of the box is an inclined surface, and a drain outlet is provided at the lowest point of the bottom of the box.

[0011] Furthermore, from the right end to the left end of the box, the projected length of the horizontal plate on the horizontal plane is greater than or equal to the projected length of the inclined plate on the horizontal plane.

[0012] Furthermore, the cross-sectional area of ​​the oil return port is larger than the cross-sectional area of ​​the oil pump suction port.

[0013] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: During operation, the lubrication system returns oil at a flow rate of 0.3–0.5 m / s directly into the upper defoaming chamber through the return port. The upper defoaming chamber is larger in volume than the return oil pipeline, forming a buffer chamber to slow down the oil flow rate and allow the oil to flow smoothly within the upper defoaming chamber to avoid generating more bubbles. When the oil flows along the inclined plate, the bubbles in the oil are subjected to the combined force of the component of their own gravity along the plate surface and the impact force of the oil flow. This combined force is opposite to the direction of the surface tension of the bubbles adhering to the plate surface. When the combined force exceeds the surface tension limit, the bubble film breaks, causing the bubbles to peel off from the oil, thus partially eliminating suspended bubbles. Unbroken bubbles flow smoothly into the lower defoaming chamber with the oil through the connecting port. The electric heating device in the lower defoaming chamber heats the oil, increasing the buoyancy of the remaining bubbles and accelerating them to rise to the oil surface. When the bubbles reach the surface and come into contact with the air, they break rapidly under the pressure difference because the internal pressure is greater than the external air pressure, completing deep defoaming. The defoamed oil is then drawn from the oil pump inlet for circulation in the lubrication system.

[0014] This invention enables the passive removal of oil bubbles through an inclined plate, while electric heating causes the bubbles to rise rapidly to the liquid surface, thus achieving active bubble rupture. The dual action of passive and active heating can effectively eliminate existing suspended bubbles in the oil, significantly improving the bubble removal efficiency. Attached Figure Description

[0015] Figure 1 This is a diagram of the internal structure of the present invention; Figure 2 This is the front view of the present invention; Figure 3 This is the front view of the present invention, in which the dashed line represents the level of lubricating oil in the lower defoaming chamber; Figure 4 This is the left view of the present invention; In the diagram, 1-box body, 2-inclined plate, 3-horizontal plate, 4-oil return port, 5-oil pump suction port, 6-upper defoaming chamber, 7-lower defoaming chamber, 8-drainage port, 9-bottom of the box body. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0017] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0018] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0019] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0020] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] This utility model discloses an antifoaming oil tank. In this utility model, the front side, rear side, left side, right side, top, and bottom 9 of the tank body 1 are... Figure 1 The placement of the middle box 1 has been determined.

[0023] The defoaming oil tank includes a tank body 1, and the tank body 1 is equipped with a degassing plate and an electric heating device. The degassing plate divides the interior of the tank body 1 into an upper defoaming chamber 6 and a lower defoaming chamber 7. The degassing plate includes a horizontal plate 3 and an inclined plate 2; wherein, the right end of the horizontal plate 3 is connected to the right side of the box 1, the front end is connected to the front side of the box 1, and the rear end is connected to the rear side of the box 1. The right end of the inclined plate 2 is higher than the left end. Its right end is connected to the left end of the horizontal plate 3, its front end is connected to the front side of the box 1, and its rear end is connected to the rear side of the box 1. A gap is reserved between the left end of the inclined plate 2 and the left side of the box 1 to form a connection port that connects the upper defoaming chamber 6 and the lower defoaming chamber 7. The lower defoaming chamber 7 stores lubricating oil, and there is a gap between the lubricating oil surface and the lower surface of the horizontal plate 3. The left end of the inclined plate 2 and the electric heating device are both located below the lubricating oil surface. The housing 1 is provided with an oil return port 4 and an oil pump suction port 5. The oil return port 4 is connected to the upper defoaming chamber 6 and is close to the right side of the housing 1. The oil pump suction port 5 is connected to the lower defoaming chamber 7.

[0024] During operation, the lubrication system returns oil at a flow rate of 0.3–0.5 m / s directly into the upper defoaming chamber 6 through the return port 4. The upper defoaming chamber 6 is larger in volume than the return oil pipeline, forming a buffer chamber to slow down the oil flow rate and allow the oil to flow smoothly within the upper defoaming chamber 6 to avoid generating more bubbles. When the oil flows along the inclined plate 2, the bubbles in the oil are subjected to the combined force of the component of their own gravity along the plate surface and the impact force of the oil flow. This combined force is opposite to the direction of the surface tension of the bubbles adhering to the plate surface. When the combined force exceeds the surface tension limit, the bubble film breaks, causing the bubbles to peel off from the oil, thus partially eliminating suspended bubbles. Unbroken bubbles flow smoothly into the lower defoaming chamber 7 with the oil through the connecting port. The electric heating device in the lower defoaming chamber 7 heats the oil, increasing the buoyancy of the remaining bubbles and accelerating them to rise to the oil surface. When the bubbles reach the surface and come into contact with the air, they break rapidly under the pressure difference because the internal pressure is greater than the external air pressure, completing deep defoaming. The defoamed oil is finally drawn from the oil pump inlet 5 and recycled by the lubrication system.

[0025] This invention enables the passive stripping of oil bubbles through the inclined plate 2, while electric heating causes the bubbles to rise quickly to the liquid surface, thus achieving active bubble rupture. The dual action of passive and active heating can effectively eliminate existing suspended bubbles in the oil, significantly improving the bubble removal efficiency.

[0026] In specific implementation, the included angle between the lower surfaces of the horizontal plate 3 and the inclined plate 2 is 120° to 135°.

[0027] Furthermore, the electric heating device is located near the bottom of the lower defoaming chamber 7, and there is a gap between the device and the bottom of the lower defoaming chamber 7. This gap is 5 to 10 cm.

[0028] In the above structure, the electric heating device is close to the bottom of the lower defoaming chamber 7, which can ensure that the air bubbles in the oil at the bottom can also float to the top. The 5-10cm gap can promote the natural convection of hot oil and prevent the oil at the bottom of the electric heating device from stagnating, thus improving the defoaming effect.

[0029] Furthermore, in the horizontal direction of the lower defoaming chamber 7, the electric heating device is located in the middle of the lower defoaming chamber 7. In specific implementation, the electric heating device can be fixed to the bottom or side wall of the box body 1 by means of a hollow bracket.

[0030] If the electric heating device is placed directly below the connection port, the oil flowing into the lower defoaming chamber 7 from the connection port will directly wash over the electric heating device, which will not only disrupt the stability of the oil flow, but also cause the oil to bypass the heating area, resulting in uneven heating. The bubbles remaining at the bottom will be difficult to float, and deep defoaming cannot be achieved.

[0031] The utility model places the electric heating device horizontally in the middle of the lower defoaming chamber 7, offset from the connecting port. This avoids direct impact or scouring of the electric heating device when the oil flows in, preventing the generation of new bubbles due to oil turbulence and ensuring smooth oil flow. On the other hand, it ensures that the oil flows fully through the heating area, so that the heating evenly covers the entire oil in the lower defoaming chamber 7, effectively promoting the rise of residual bubbles in the oil, improving the active defoaming effect, and reducing the wear and tear on the electric heating device caused by oil impact, thus extending the service life of the device.

[0032] Furthermore, the oil return port 4 is located on the right side of the housing 1, near the horizontal plate 3; the oil pump suction port 5 is located on the right side of the housing 1, near the bottom of the lower defoaming chamber 7.

[0033] The oil return port 4 is located on the right side of the housing 1, which ensures that the axis of the oil return port 4 is parallel to the horizontal plate 3, preventing oil from impacting the horizontal plate 3 and generating air bubbles. Being close to the horizontal plate 3 further reduces air bubble generation.

[0034] The oil pump inlet 5 is located on the right side of the housing 1 and near the bottom of the lower defoaming chamber 7. This allows the path between the return oil port 4 and the oil pump inlet 5 to be longer, ensuring that the oil is fully eliminated before being sent to the oil pump through the oil pump inlet 5.

[0035] Furthermore, the bottom 9 of the box is an inclined surface, and a drain outlet 8 is provided at the lowest point of the bottom 9 of the box.

[0036] This design allows impurities in the oil to accumulate at the bottom of the lower defoaming chamber 7 under gravity, and then be easily discharged through the drain port 8, thus improving the cleanliness of the oil. Furthermore, from the right end to the left end of the box 1, the projected length of the horizontal plate 3 on the horizontal plane is greater than or equal to the projected length of the inclined plate 2 on the horizontal plane.

[0037] The horizontal plate 3 is set longer to ensure that the oil flows slowly in the upper defoaming chamber 6, avoiding the generation of new bubbles. At the same time, it gives the bubbles in the oil more time to rise and burst at the surface. In practice, the flow rate should be controlled to ensure that there is a certain gap between the oil and the top surface of the upper defoaming chamber 69, so as to effectively defoam.

[0038] The longer horizontal plate 3 ensures a larger space between the lubricating oil surface in the lower defoaming chamber 7 and the lower surface of the horizontal plate 3, allowing more bubbles to rise to the lubricating oil surface and break. At the same time, a larger space between the lubricating oil surface in the lower defoaming chamber 7 and the lower surface of the horizontal plate 3 results in a greater pressure difference between the inside and outside of the bubbles, which is more conducive to bubble breakage.

[0039] Furthermore, the cross-sectional area of ​​the oil return port 4 is larger than the cross-sectional area of ​​the oil pump suction port 5.

[0040] The cross-sectional area of ​​the return oil port 4 is larger than that of the oil pump suction port 5 to ensure that the return oil flow rate matches the oil supply rate and to avoid insufficient oil being delivered to the oil pump through the oil pump suction port 5.

[0041] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A defoaming oil tank, characterized in that: Includes a box body (1), which is equipped with a degassing plate and an electric heating device. The degassing plate divides the interior of the box body (1) into an upper degassing chamber (6) and a lower degassing chamber (7). The degassing plate includes a horizontal plate (3) and an inclined plate (2); wherein the right end of the horizontal plate (3) is connected to the right side of the box body (1), the front end is connected to the front side of the box body (1), and the rear end is connected to the rear side of the box body (1); The right end of the inclined plate (2) is higher than the left end. Its right end is connected to the left end of the horizontal plate (3), its front end is connected to the front side of the box (1), and its rear end is connected to the rear side of the box (1). A gap is reserved between the left end of the inclined plate (2) and the left side of the box (1) to form a connection port that connects the upper defoaming chamber (6) and the lower defoaming chamber (7). The lower defoaming chamber (7) stores lubricating oil. There is a gap between the lubricating oil surface and the lower surface of the horizontal plate (3), and the left end of the inclined plate (2) and the electric heating device are both located below the lubricating oil surface. The housing (1) is provided with an oil return port (4) and an oil pump suction port (5). The oil return port (4) is connected to the upper defoaming chamber (6) and is close to the right side of the housing (1). The oil pump suction port (5) is connected to the lower defoaming chamber (7) and is close to the rear side of the housing (1).

2. The defoaming oil tank according to claim 1, characterized in that: The electric heating device is located near the bottom of the lower defoaming chamber (7) and there is a gap between it and the bottom of the lower defoaming chamber (7).

3. The defoaming oil tank according to claim 2, characterized in that: In the horizontal direction of the lower defoaming chamber (7), the electric heating device is located in the middle of the lower defoaming chamber (7).

4. The defoaming oil tank according to claim 1, characterized in that: The oil return port (4) is located on the right side of the housing (1); the oil pump inlet (5) is located on the right side of the housing (1) and is close to the bottom of the lower defoaming chamber (7).

5. The defoaming oil tank according to claim 1, characterized in that: The bottom (9) of the box is an inclined surface, and a drain outlet (8) is provided at the lowest point of the bottom (9).

6. The defoaming oil tank according to claim 1, characterized in that: From the right end to the left end of the box (1), the projected length of the horizontal plate (3) on the horizontal plane is greater than or equal to the projected length of the inclined plate (2) on the horizontal plane.

7. The defoaming oil tank according to claim 1, characterized in that: The cross-sectional area of ​​the return port (4) is larger than that of the oil pump inlet (5).

Images