A hydraulic oil cooling device

Abstract

This application provides a hydraulic oil cooling device for communication with an oil tank. It includes a heat exchange assembly, a housing, and a water-cooled heat exchanger fixed inside the housing. The housing has a mounting groove for mounting a fan assembly. The water-cooled heat exchanger includes a heat exchange chamber, inside which a hydraulic oil pipe is fixed. The hydraulic oil pipe has an inlet end and an outlet end, with the inlet end higher than the outlet end. The inlet end is configured to communicate with the oil tank. The heat exchange chamber also has a water inlet and an outlet, with the inlet end near the outlet end and the outlet end near the inlet end. Along the length of the hydraulic oil pipe, the heat exchange chamber also has multiple baffles, each including a water-blocking portion, distributed on both sides of the hydraulic oil pipe. This improved hydraulic oil cooling device can improve heat exchange efficiency and reduce residual oil or impurities in the hydraulic oil pipe.

Description

Technical Field

[0001] This application relates to the field of hydraulics, and more specifically, to a hydraulic oil cooling device. Background Technology

[0002] Hydraulic systems are widely used in numerous industrial machines, engineering machinery, and production equipment, transmitting power and control signals through hydraulic oil to drive various actuators. During operation, heat is generated due to energy conversion efficiency issues, causing the hydraulic oil temperature to rise. When components such as hydraulic pumps operate, some mechanical energy is converted into heat, also leading to an increase in oil temperature. High temperatures reduce hydraulic oil viscosity, weaken lubrication, accelerate oil oxidation, generate impurities, and clog components; they also cause rubber seals to age and deform, leading to leaks, severely impacting system performance and component lifespan, and increasing maintenance costs. Therefore, hydraulic oil cooling is crucial for maintaining the stable and efficient operation of hydraulic systems, necessitating the use of effective hydraulic oil cooling devices to control oil temperature. Summary of the Invention

[0003] This application provides a hydraulic oil cooling device that can improve heat exchange efficiency and reduce the residue of oil or impurities in hydraulic oil pipes.

[0004] Specifically, this application is implemented through the following technical solution:

[0005] This application provides a hydraulic oil cooling device for connection to an oil tank, including...

[0006] A heat exchange assembly includes a housing and a water-cooled heat exchanger fixed inside the housing. The housing has a mounting slot for mounting a fan assembly.

[0007] The water-cooled heat exchanger includes a heat exchange chamber, inside which a hydraulic oil pipe is fixed. The hydraulic oil pipe includes an inlet end and an outlet end. The height of the inlet end is higher than the height of the outlet end. The inlet end is configured to communicate with an oil tank.

[0008] The heat exchange chamber is also provided with an inlet and an outlet, with the inlet close to the outlet and the outlet close to the inlet. Along the length of the hydraulic oil pipe, the heat exchange chamber is also fixed with multiple baffles, each baffle including a water-blocking part, which are distributed on both sides of the hydraulic oil pipe.

[0009] Optionally, the inlet and the outlet are located on the same side;

[0010] The baffle also includes a water-permeable section with multiple water-permeable holes. The hydraulic oil pipe passes through multiple baffles and is fixed to multiple baffles.

[0011] Optionally, the plurality of the baffles include a first baffle, a second baffle, and a third baffle arranged sequentially along the direction from the water inlet to the water outlet, wherein the side of the hydraulic oil pipe closer to the water inlet is the first side, and the side farther from the water inlet is the second side.

[0012] The first spoiler has a water-blocking part on the first side and a water-permeable part on the second side; the second spoiler has a water-blocking part on the second side and a water-permeable part on the first side; and the third spoiler has a water-blocking part on the first side and a water-permeable part on the second side.

[0013] Optionally, the permeable areas of the first, second, and third baffles increase sequentially.

[0014] Optionally, a spiral baffle is fixed inside the hydraulic oil pipe along its length.

[0015] Optionally, the heat exchange chamber is provided with a first mixing chamber and a second mixing chamber at both ends, the inlet end of the hydraulic oil pipe is connected to the first mixing chamber, the outlet end is connected to the second mixing chamber, and the first mixing chamber is configured to be connected to the oil tank.

[0016] Optionally, the first mixing chamber and the second mixing chamber are each equipped with a temperature sensor, which is used to detect the temperature of the hydraulic oil.

[0017] Optionally, along the length of the housing, the housing has two mounting slots, and two fan assemblies are fixed in each slot. The housing also has ventilation windows on the side wall facing the mounting slots.

[0018] This application provides a hydraulic oil cooling device. First, since a fan assembly is installed on the mounting groove of the housing, and hydraulic oil requiring heat exchange flows into the water-cooled heat exchanger, this application can achieve air cooling of the hydraulic oil by blowing air into the water-cooled heat exchanger through the fan assembly. Second, the arrangement of multiple baffles and water-blocking parts distributed on both sides of the hydraulic oil pipe allows the cooling water flowing into the heat exchange chamber to change direction during flow, thereby effectively extending the flow path of the cooling water and improving heat exchange efficiency. Finally, by setting the height of the inlet end of the hydraulic oil pipe to be greater than the height of the outlet end, this application allows the hydraulic oil to flow more smoothly under the action of gravity, thereby reducing the residue of oil or impurities in the hydraulic oil pipe and improving the operating efficiency and reliability of the device. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a cooling device shown in an exemplary embodiment of this application;

[0020] Figure 2 This is a front view of a cooling device illustrated in an exemplary embodiment of this application;

[0021] Figure 3 This is an internal schematic diagram of a water-cooled heat exchanger shown in an exemplary embodiment of this application;

[0022] Figure 4 This is a schematic diagram of a baffle plate shown in an exemplary embodiment of this application;

[0023] Figure 5 This is a side view of a cooling device illustrated in an exemplary embodiment of this application;

[0024] Figure 6 This is a schematic diagram showing the positions of the oil drum and the cooling device in an exemplary embodiment of this application.

[0025] Wherein: 100, oil drum; 200, heat exchange assembly; 210, shell; 211, mounting groove; 220, water-cooled heat exchanger; 221, heat exchange chamber; 221a, water inlet; 221b, water outlet; 222, hydraulic oil pipe; 222a, liquid inlet end; 222b, liquid outlet end; 230, fan assembly; 240, baffle; 240a, water baffle; 240b, water permeable part; 241, first baffle; 242, second baffle; 243, third baffle; 250, spiral baffle; 260, first mixing chamber; 270, second mixing chamber; 280, temperature sensor; 290, ventilation window; 300, bracket. Detailed Implementation

[0026] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0027] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movement of the components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0028] Please refer to Figure 1 and Figure 2 Combining Figure 6This application provides a hydraulic oil cooling device for communication with an oil tank 100 and a heat exchange assembly 200. The heat exchange assembly 200 includes a housing 210 and a water-cooled heat exchanger 220 fixed inside the housing 210. The housing 210 has a mounting groove 211, and a fan assembly 230 is mounted in the mounting groove 211. Figure 3 The water-cooled heat exchanger 220 includes a heat exchange chamber 221. A hydraulic oil pipe 222 is fixed inside the heat exchange chamber 221. The hydraulic oil pipe 222 includes an inlet end 222a and an outlet end 222b. The height of the inlet end 222a is higher than the height of the outlet end 222b (here, height refers to the height relative to the ground under normal operating conditions). The inlet end 222a is connected to the oil tank 100. The heat exchange chamber 221 also has a water inlet 221a and a water outlet 221b. The water inlet 221a is closer to the outlet end 222b, and the water outlet 221b is closer to the inlet end 222a. The flow direction of the cooling water entering the heat exchange chamber 221 is opposite to the flow direction of the hydraulic oil, resulting in more complete heat exchange and improved heat exchange efficiency. Along the length of the hydraulic oil pipe 222, the heat exchange chamber 221 is also fixed with a plurality of baffles 240. The baffles 240 include water-blocking parts 240a, and the plurality of water-blocking parts 240a are distributed on both sides of the hydraulic oil pipe 222.

[0029] First, since a fan assembly 230 is installed on the mounting slot 211 of the housing 210, and hydraulic oil requiring heat exchange is circulated inside the water-cooled heat exchanger 220, this application can achieve air cooling of the hydraulic oil by blowing air into the water-cooled heat exchanger 220 through the fan assembly 230. Second, the arrangement of multiple baffles 240 and water-blocking portions 240a distributed on both sides of the hydraulic oil pipe 222 enables the cooling water flowing into the heat exchange chamber 221 to change direction during flow, thereby effectively extending the flow path of the cooling water and improving the heat exchange efficiency.

[0030] During the cooling process of hydraulic oil, the temperature of the hydraulic oil at the outlet end 222b will be lower than that at the inlet end 222a, and its fluidity will correspondingly decrease. Under such circumstances, oil residue or impurities may remain at the outlet end 222b. This application addresses this issue by setting the height of the inlet end 222a of the hydraulic oil pipe 222 to be greater than the height of the outlet end 222b, allowing the hydraulic oil to flow more smoothly under the influence of gravity, thereby reducing the residue of oil or impurities in the hydraulic oil pipe 222 and improving the operating efficiency and reliability of the device.

[0031] In one embodiment, combined with Figure 3The inlet 221a and outlet 221b are located on the same side; the baffle 240 also includes a permeable section 240b. The permeable section 240b has multiple permeable holes, through which the hydraulic oil pipe 222 passes and is fixed to the baffles 240. The inlet 221a and outlet 221b are located on the same side, as are the inlet and outlet pipes, facilitating unified planning and layout of the pipelines and reducing pipe crossings and detours. Compared to a permeable section 240b without any features, such as a baffle 240 that is only half-plate fixed to one side of the hydraulic oil pipe 222, the multiple permeable holes in the permeable section 240b have a guiding function, making the water flow more evenly distributed as it flows through the heat exchange chamber 221, preventing direct impact on the hydraulic oil pipe 222 and causing localized wear. Simultaneously, the evenly distributed water flow increases the contact area between the water flow and the hydraulic oil pipe 222, further improving the heat exchange effect.

[0032] Combination Figure 3 and Figure 4 In one embodiment, the plurality of baffles 240 include a first baffle 241, a second baffle 242, and a third baffle 243 arranged sequentially along the direction from the inlet 221a to the outlet 221b. The side of the hydraulic oil pipe closer to the inlet 221a is the first side, and the side farther from the inlet 221a is the second side. The water-blocking portion 240a of the first baffle 241 is disposed on the first side, and the water-permeable portion 240b is disposed on the second side. The water-blocking portion 240a of the second baffle 242 is disposed on the second side, and the water-permeable portion 240b is disposed on the first side. The water-blocking portion 240a of the third baffle 243 is disposed on the first side, and the water-permeable portion 240b is disposed on the second side. Specifically, the inlet 221a and the outlet 221b on the same side are located on the top side of the water-cooled heat exchanger 220. The distribution of the permeable portion 240b and the water-blocking portion 240a in this way allows the cooling water to flow through the heat exchange cavity in the following manner: Figure 3 The up-and-down reversal path indicated by the middle arrow increases the contact time and area between the cooling water and the hydraulic oil pipe 222, thereby improving the heat exchange efficiency.

[0033] In one embodiment, please refer to Figure 4The areas of the permeable portions 240b of the first spoiler 241, the second spoiler 242, and the third spoiler 243 increase sequentially. Furthermore, the first spoiler 241, the second spoiler 242, and the third spoiler 243 are distributed with the inlet 221a pointing towards the outlet 221b; that is, the closer to the inlet end 222a of the hydraulic oil pipe 222, the larger the area of ​​the permeable portion 240b on the spoiler 240. During the cooling process of the hydraulic oil, the hydraulic oil flows in from the inlet end 222a, with a relatively high initial temperature. Because the area of ​​the permeable portion 240b on the spoiler 240 is larger the closer to the inlet end 222a of the hydraulic oil pipe 222, this design allows more cooling water to pass through in the initial cooling stage, even though the hydraulic oil temperature is high, thereby quickly removing heat and accelerating the cooling process of the hydraulic oil. As the hydraulic oil flows along the oil pipe and gradually moves away from the inlet end 222a, its temperature gradually decreases. At this point, the smaller permeable area 240b can concentrate the cooling water flow, ensuring that the hydraulic oil continues to receive effective cooling in the subsequent path, while avoiding a decrease in cooling efficiency due to water flow dispersion. This gradient distribution of the permeable area 240b improves cooling efficiency.

[0034] Combination Figure 3 In one embodiment, a spiral baffle 250 is fixed inside the hydraulic oil pipe 222 along its length. The spiral baffle 250 causes spiral disturbances in the hydraulic oil as it flows within the pipe, increasing turbulence and disrupting the fluid boundary layer, thereby improving the heat transfer coefficient and enhancing the heat transfer effect. Simultaneously, the spiral baffle 250 extends the flow path of the hydraulic oil within the pipe, resulting in a longer contact time between the oil and the pipe wall, further improving heat transfer efficiency.

[0035] In one embodiment, a first mixing chamber 260 and a second mixing chamber 270 are respectively provided at both ends of the heat exchange chamber 221. The inlet end 222a of the hydraulic oil pipe 222 is connected to the first mixing chamber 260, and the outlet end 222b is connected to the second mixing chamber 270. The first mixing chamber 260 is also connected to the oil tank 100. The first mixing chamber 260 and the second mixing chamber 270 are provided to ensure that the hydraulic oil is fully and evenly mixed before entering the hydraulic oil pipe 222, ensuring the temperature consistency of the inlet end 222a. The second mixing chamber 270 at the outlet end 222b helps to stabilize the oil flow, buffer pressure fluctuations, reduce the impact on the oil-using device, and avoid excessive local temperature, thereby improving the stability and heat exchange efficiency of the entire hydraulic system.

[0036] In one embodiment, the first mixing chamber 260 and the second mixing chamber 270 are each equipped with a temperature sensor 280, which is used to detect the temperature of the hydraulic oil. The temperature sensor 280 can transmit temperature information to an external display device via electrical signals or other wireless signals, allowing the operator to know the temperature of the hydraulic oil in the two chambers, thereby knowing the heat exchange effect of the water-cooled heat exchanger 220, and timely controlling the flow rate and temperature of the cooling water, thus controlling the heat exchange effect.

[0037] refer to Figure 1 and Figure 2 In one embodiment, along the length of the housing 210, two mounting slots 211 are formed, and two fan assemblies 230 are fixed to each slot. A ventilation window 290 is provided on the side wall of the housing 210 facing the mounting slots 211. The two fan assemblies 230 can more evenly and comprehensively cool the surface of the water-cooled heat exchanger 220. The design of the ventilation window 290 ensures that airflow can smoothly enter the interior of the housing 210 and directly act on the water-cooled heat exchanger 220, improving heat exchange efficiency. This structural arrangement optimizes the heat dissipation performance of the device and ensures stable cooling of the hydraulic oil.

[0038] In one specific embodiment, combined with Figure 5 The water-cooled heat exchanger 220 is fixed inside the housing 210 by a bracket 300. The bracket 300 includes support rods inclined on both sides of the water-cooled heat exchanger 220 and a support pad fixed between the water-cooled heat exchanger 220 and the top or bottom wall of the housing 210.

[0039] It should be noted that the technical solutions or features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A hydraulic oil cooling device, characterized in that, For connection with oil drum (100), including The heat exchange assembly (200) includes a housing (210) and a water-cooled heat exchanger (220) fixed inside the housing (210). The housing (210) has a mounting groove (211) on which a fan assembly (230) is mounted. The water-cooled heat exchanger (220) includes a heat exchange chamber (221), and a hydraulic oil pipe (222) is fixed inside the heat exchange chamber (221). The hydraulic oil pipe (222) includes an inlet end (222a) and an outlet end (222b). The height of the inlet end (222a) is higher than the height of the outlet end (222b). The inlet end (222a) is configured to communicate with the oil tank (100). The heat exchange chamber (221) is also provided with an inlet (221a) and an outlet (221b), with the inlet (221a) close to the outlet end (222b) and the outlet (221b) close to the inlet end (222a). Along the length of the hydraulic oil pipe (222), the heat exchange chamber (221) is also fixed with a plurality of baffles (240), each baffle (240) including a water baffle (240a), which are distributed on both sides of the hydraulic oil pipe (222).

2. The hydraulic oil cooling device as described in claim 1, characterized in that, The inlet (221a) and the outlet (221b) are located on the same side; The spoiler (240) also includes a water-permeable part (240b), which has multiple water-permeable holes. The hydraulic oil pipe (222) passes through multiple spoilers (240) and is fixed to multiple spoilers (240).

3. The hydraulic oil cooling device as described in claim 2, characterized in that, The plurality of the aforementioned baffles (240) include a first baffle (241), a second baffle (242), and a third baffle (243) arranged sequentially along the direction from the inlet (221a) to the outlet (221b). The side of the hydraulic oil pipe (222) closer to the inlet (221a) is the first side, and the side farther away from the inlet (221a) is the second side. The first spoiler (241) has a water-blocking part (240a) on the first side and a water-permeable part (240b) on the second side. The second spoiler (242) has a water-blocking part (240a) on the second side and a water-permeable part (240b) on the first side. The third spoiler (243) has a water-blocking part (240a) on the first side and a water-permeable part (240b) on the second side.

4. The hydraulic oil cooling device as described in claim 3, characterized in that, The area of ​​the permeable portion (240b) of the first spoiler (241), the second spoiler (242), and the third spoiler (243) increases sequentially.

5. The hydraulic oil cooling device according to any one of claims 1 to 4, characterized in that, Along the length of the hydraulic oil pipe (222), a spiral baffle (250) is fixed inside the hydraulic oil pipe (222).

6. The hydraulic oil cooling device as described in claim 1, characterized in that, The heat exchange chamber (221) is provided with a first mixing chamber (260) and a second mixing chamber (270) at both ends. The inlet end (222a) of the hydraulic oil pipe (222) is connected to the first mixing chamber (260), and the outlet end (222b) is connected to the second mixing chamber (270). The first mixing chamber (260) is configured to be connected to the oil tank (100).

7. The hydraulic oil cooling device as described in claim 6, characterized in that, The first mixing chamber (260) and the second mixing chamber (270) are respectively provided with temperature sensors (280), which are used to detect the temperature of hydraulic oil.

8. The hydraulic oil cooling device as described in claim 1, characterized in that, Along the length of the housing (210), the housing (210) has two mounting slots (211) and two fan assemblies (230) are fixed thereon, and the housing (210) has ventilation windows (290) on the side wall opposite to the mounting slots (211).

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