A high flux hydraulic oil cooler for a forging hydraulic press

Abstract

The present application relates to the technical field of forging hydraulic press, and discloses a high-flux hydraulic oil cooler for a forging hydraulic press, which comprises an oil storage tank, an oil pump and a fan assembly, and further comprises an air cooling assembly, the air cooling assembly is provided with a sealed plate type structure shell, the air cooling assembly adopts arrayed straight-through radiators to heat-exchange and cool the hydraulic oil flowing in the shell, the air cooling assembly can disturb the flowing hydraulic oil to avoid forming a local overheating area, a water cooling assembly is further arranged in the shell, the shell is provided with a sealing plate, the water cooling assembly is installed on the sealing plate and is staggered with the straight-through radiators of the air cooling assembly.The present application adopts an integrated cross-pipe bundle structure, a multi-mode stepless collaborative control and a cold oil mixed active thermal management technology, realizes efficient heat transfer, energy saving on demand, rapid peak clipping and emergency redundancy, significantly reduces the operation energy consumption and temperature fluctuation, and prolongs the service life of the hydraulic system.

Description

Technical Field

[0001] This invention relates to the field of forging hydraulic press technology, specifically to a high-throughput hydraulic oil cooler for forging hydraulic presses. Background Technology

[0002] During operation, the hydraulic pump, relief valve, and actuators of a forging hydraulic press generate significant energy losses that are converted into heat, causing the hydraulic oil temperature to rise continuously. The viscosity, lubricity, and volumetric efficiency of hydraulic oil are extremely sensitive to temperature. When the oil temperature exceeds 55°C, the oil viscosity decreases significantly, system leakage increases, and volumetric efficiency decreases. Simultaneously, rubber seals age faster, and pump and valve wear intensifies, potentially leading to press shutdown or even equipment failure. Currently, commonly used hydraulic oil cooling technologies for forging hydraulic presses include single water-cooled coolers, employing plate or shell-and-tube heat exchangers that use cooling water as the medium to remove heat from the hydraulic oil, and single air-cooled coolers, using finned tube bundles in conjunction with axial flow fans to force air convection for heat dissipation. A series / parallel water-cooled and air-cooled system installs the water cooler and air cooler separately in a hydraulic circuit, switching or operating them simultaneously via valves. This solution achieves complementarity between the two cooling methods to some extent. However, the water cooler and air cooler are independent devices, occupying a large space and having complex piping connections. Moreover, they are mostly switched on a time-sharing basis or operate at full power simultaneously, making it impossible to finely adjust according to real-time heat load, resulting in a "one-size-fits-all" energy waste.

[0003] In summary, existing hydraulic oil cooling technologies suffer from a lack of multi-mode coordination and continuous adjustment capabilities, resulting in significant energy waste at low loads and insufficient cooling capacity at high loads. Furthermore, their reliance on solid wall heat transfer leads to slow response times due to inherent thermal resistance and inertia, making it difficult to effectively suppress temperature spikes during the pressurization and holding phases. Therefore, there is an urgent need to develop a compact, fast-responding, energy-efficient hydraulic oil cooling system with redundancy capabilities to address the aforementioned shortcomings of existing technologies under intermittent heavy-load conditions in forging hydraulic presses. Summary of the Invention

[0004] Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a high-throughput hydraulic oil cooler for forging hydraulic presses, which solves the problems of existing hydraulic oil cooling technologies, such as single or simple superposition of cooling modes, lack of multi-mode coordination and continuous adjustment capabilities, serious energy waste at low loads, and insufficient cooling capacity at high loads.

[0006] Technical solution To achieve the above objectives, the present invention provides the following technical solution: a high-throughput hydraulic oil cooler for forging hydraulic presses, comprising an oil reservoir, an oil pump, and a fan assembly, and further comprising: The air-cooled assembly has a sealed plate-type housing. The air-cooled assembly uses an array of straight-through heat dissipation pipes to exchange heat and cool the hydraulic oil flowing inside the housing. The air-cooled assembly can also turbulent the flow of hydraulic oil to avoid the formation of local overheating areas. The water-cooled assembly has a sealing plate on the housing. The water-cooled assembly is mounted on the sealing plate and is arranged alternately with the straight heat dissipation pipe of the air-cooled assembly. The water-cooled assembly uses multiple water-cooled pipes to circulate cooling water and works in conjunction with the air-cooled assembly to force-cool the hydraulic oil in the housing, thereby improving the cooling efficiency of the high-temperature hydraulic oil. The water distribution assembly is located at the upper end of the housing and has a water inlet area. The water inlet area divides the water-cooled assembly into multiple cooling zones, allowing the water-cooled assembly to adjust the flow of cooling water according to the temperature of the hydraulic oil to achieve different cooling efficiencies. The oil inlet assembly is located at the lower end of the oil reservoir and is used to directly supply high-temperature hydraulic oil into the housing. It can also use an oil pump to mix low-temperature hydraulic oil in the oil reservoir into the housing to achieve mixing and cooling, so as to cope with the temperature fluctuation of the high-temperature hydraulic oil and ensure the cooling efficiency of the cooler. One end of the housing is fixedly connected to an oil outlet pipe, and the other end of the housing is connected to the oil reservoir.

[0007] As a further description of the above technical solution, the housing is composed of two side plates and a U-shaped frame. The two side plates are respectively fixed on both sides of the frame. The arrayed straight heat dissipation pipes are fixed between the two side plates, and the side walls of the side plates are fixedly connected to the pipe openings of the straight heat dissipation pipes through through holes. The sealing plate is fixed inside the housing and forms a sealed oil passage with the side plates and the frame. One end of the oil outlet pipe is located at the lower end of the sealing plate. Multiple heat-conducting strips are fixedly connected to the opposite sides of the two side plates. The heat-conducting strips are located at the heat dissipation holes. The air collection shroud of the fan assembly is fixed to one side of the housing to deliver airflow to multiple straight-through heat dissipation pipes.

[0008] As a further description of the above technical solution, the water-cooling assembly includes a partition plate, the lower ends of multiple water-cooling pipes are fixedly connected to the side wall of the partition plate, the partition plate is fixed inside the housing and forms a reflux cavity with the lower inner wall of the housing, a reflux pipe is fixedly connected to the lower end of the housing, the side wall of the sealing plate is fixedly connected to the upper end of multiple water-cooling pipes through an assembly hole, and the upper end of the sealing plate is connected to a water distribution assembly for introducing cooling water into the water-cooling pipes. The multiple water-cooling pipes are arranged in two rows and are staggered. The water-cooling pipes have a wavy structure.

[0009] As a further description of the above technical solution, an oil distribution plate is fixedly connected inside the housing, the oil outlet of the oil inlet assembly is located at the lower end of the oil distribution plate, the side wall of the oil distribution plate is fixedly connected to the pipe wall of the water cooling pipe through the installation port, the side wall of the oil distribution plate is provided with multiple oil distribution protrusions, and the side wall of the oil distribution protrusions is provided with multiple transverse oil distribution holes and multiple longitudinal oil distribution holes.

[0010] As a further description of the above technical solution, the water distribution component includes a rectangular frame, in which a cross is fixedly connected. The cross divides the rectangular frame into four rectangular areas, and a first fixing plate and a second fixing plate are fixedly connected to each of the four rectangular areas. The side wall of the first fixing plate has a drain outlet that matches the upper end of the water-cooling pipe. A guide nozzle is fixedly connected to the upper end of the second fixing plate. A tee pipe is provided at the upper end of the rectangular frame. A water inlet pipe is fixedly connected to one end of the tee pipe, and a diversion pipe is fixedly connected to the other two ends of the tee pipe. Two electrically controlled ball valves are fixedly connected to the wall of the diversion pipe, and the guide nozzle is fixed to the wall of the diversion pipe.

[0011] As a further description of the above technical solution, multiple fixing parts are provided on both the rectangular frame and the cross. The fixing parts are fixedly connected to the upper end of the sealing plate by bolts. A rubber gasket that mates with the rectangular frame and the cross is embedded in the upper end of the sealing plate. A cover plate is provided on the side wall of the rectangular frame. Fixing feet are provided at both ends of the cover plate. The fixing feet are fixed to the upper end of the housing by bolts.

[0012] As a further description of the above technical solution, a diverter nozzle is fixedly connected inside the drain outlet. The lower end of the diverter nozzle extends into the upper end of the water-cooling pipe and is provided with two inclined portions. The side walls of the two inclined portions are provided with multiple drainage channels.

[0013] As a further description of the above technical solution, the oil inlet assembly includes a housing, an oil inlet pipe fixedly connected to one side of the housing, a cold oil pipe fixedly connected to the other side of the housing, one end of the cold oil pipe fixed to the lower end of the oil reservoir, a one-way valve installed on the pipe wall of the cold oil pipe, an oil pump installed on the pipe wall of the cold oil pipe, a constricted opening provided at one end of the housing, a mixing chamber provided on one side of the constricted opening, a manifold fixedly connected to one side of the mixing chamber, and one end of the manifold fixedly connected to one side of the housing; The outer casing and mixing chamber are equipped with a mixing component for forcibly mixing the hydraulic oil entering the casing.

[0014] As a further description of the above technical solution, the mixing component includes an impeller, which is disposed in a mixing chamber and has a hollow shaft fixedly connected to its center. One end of the hollow shaft has a flared portion, and a transmission frame is fixedly connected to one side of the flared portion. One end of the transmission frame is fixedly connected to a turntable, and a transmission shaft is fixedly connected to the center of the turntable. The shaft wall of the transmission shaft is rotatably connected to one side of the housing through a sealed bearing. A motor is fixedly connected to one side of the housing, and the output end of the motor is fixedly connected to one end of the transmission shaft.

[0015] Beneficial effects Compared with the prior art, the present invention provides a high-throughput hydraulic oil cooler for forging hydraulic presses, which has the following beneficial effects: 1. This solution integrates air-cooled pipes, water-cooled pipes, heat-conducting strips, and cold oil mixing interfaces onto the same plate-type housing. The longitudinal water-cooled pipes and the transverse air-cooled pipes are arranged perpendicularly and staggered. The hydraulic oil enters from one corner of the housing and flows out diagonally. At the same time, the air-cooled pipes adopt a straight-through form in conjunction with double-sided heat-conducting strips. Compared with traditional split-type equipment, this structure can force the oil to be repeatedly flushed and turned between the pipe bundles to form forced mixed flow, thereby improving the oil-side heat transfer coefficient. Moreover, the straight-through air-cooled pipes have low wind resistance and small air volume loss. The double-sided heat-conducting strips not only increase the natural heat dissipation area but also strengthen the rigidity of the housing, achieving a synergistic effect of forced air cooling and natural cooling.

[0016] 2. This solution can adjust the use of four modes in real time—natural cooling, air cooling, water cooling, and a mixture of cold and oil—based on real-time oil temperature and its changing trends. The cooling power is continuously adjustable from zero to maximum. Under low load, only natural cooling or low-speed air cooling is used, while under high load, strong cooling is activated in stages, avoiding the traditional "one-size-fits-all" full-power operation. At the same time, continuous adjustment eliminates the temperature abrupt changes of on-off cooling, reducing thermal shock to the hydraulic system and extending the service life of components.

[0017] 3. This solution includes an independent cold oil supply mixer next to the cooler. This module relies on physical thermal balance to neutralize temperature peaks in a short time, eliminates heat exchanger thermal resistance and thermal inertia, and controls steady-state oil temperature fluctuations. Since the mixed cooling takes on the peak heat load, the main cooler can be selected according to the conventional average heat load. At the same time, when the main cooler's heat dissipation capacity is reduced due to scaling, fan failure, or high ambient temperature, the mixing module can be put into operation in conjunction with or independently to provide emergency redundant cooling, avoid the entire unit from shutting down, and buy time for maintenance. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a high-throughput hydraulic oil cooler for a forging hydraulic press proposed in this invention; Figure 2 This is a schematic diagram of the internal structure of a high-throughput hydraulic oil cooler for a forging hydraulic press proposed in this invention. Figure 3 This invention proposes a high-throughput hydraulic oil cooler for forging hydraulic presses. Figure 2 Enlarged view of the structure at point A in the middle; Figure 4 This is a schematic diagram of the cover plate, shell, and straight-through heat dissipation pipe of a high-throughput hydraulic oil cooler for a forging hydraulic press proposed in this invention. Figure 5 This is a schematic diagram of the water distribution assembly in a high-throughput hydraulic oil cooler for a forging hydraulic press, as proposed in this invention. Figure 6 This is a cross-sectional view of the water distribution assembly in a high-throughput hydraulic oil cooler for a forging hydraulic press, as proposed in this invention. Figure 7 This is a schematic diagram of the water-cooling component in a high-throughput hydraulic oil cooler for a forging hydraulic press, as proposed in this invention. Figure 8 The present invention proposes a high-throughput hydraulic oil cooler for forging hydraulic presses. Figure 1 Rear view; Figure 9 The present invention proposes a high-throughput hydraulic oil cooler for forging hydraulic presses. Figure 2 The front view; Figure 10 This is a schematic diagram of the oil inlet assembly in a high-throughput hydraulic oil cooler for a forging hydraulic press, as proposed in this invention. Figure 11 This is a schematic diagram of the outer shell and manifold of a high-throughput hydraulic oil cooler for a forging hydraulic press proposed in this invention.

[0019] In the diagram: 1. Side plate; 2. Heat-conducting strip; 3. Cover plate; 4. Oil tank; 5. Oil pump; 6. Motor; 7. Outer shell; 8. Frame; 9. Water-cooling pipe; 10. Partition plate; 11. Rectangular frame; 12. Electric ball valve; 13. Sealing plate; 14. Straight-through heat dissipation pipe; 15. Diverter pipe; 16. Guide nozzle; 17. Second fixing plate; 18. Cross; 19. T-pipe; 20. First fixing plate; 21. Diverter nozzle; 22. Inclined part; 23. Drainage channel; 24. Rubber gasket; 25. Oil distribution plate; 26. Oil distribution protrusion; 27. Fan assembly; 28. Hollow shaft; 29. ​​Flared part; 30. Manifold; 31. Oil inlet pipe; 32. Transmission frame; 33. Turntable; 34. Impeller; 35. Constriction part; 36. Mixing chamber. Detailed Implementation

[0020] 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.

[0021] Example: This solution integrates multiple cooling mechanisms into a single straight-tube staggered heat exchanger, enabling direct airflow from the fan to the air-cooled pipes and heat-conducting fins, vertical cross-arrangement of water-cooled and air-cooled pipes, and diagonal inflow and outflow of hydraulic oil to form a mixed flow. It also incorporates a bypass oil-cooled mixer to reduce peak flow. This allows for multi-mode synergistic cooling within a highly compact single housing, with stepless adjustment of air cooling, water cooling, and natural heat dissipation, avoiding high-energy-consumption "one-size-fits-all" operation. Furthermore, the oil-cooled mixer provides rapid thermal response, quickly suppressing temperature spikes and significantly reducing the design load on the main cooler. Compared to existing technologies, the hybrid cooling and multi-mode synergy can control steady-state oil temperature fluctuations within ±3℃, reducing hydraulic oil temperature fluctuations. Moreover, different cooling methods can be activated as needed, especially under low loads, where natural cooling or low-speed air cooling can be used alone, eliminating the defects of large temperature fluctuations. Finally, the rapid neutralization effect of cold oil mixing compensates for the inherent thermal inertia of the heat exchanger, avoiding hydraulic oil viscosity reduction, seal aging, and system failures caused by temperature runaway, significantly improving the reliability and continuous operation capability of forging hydraulic presses.

[0022] This technical solution provides a high-throughput hydraulic oil cooler for forging hydraulic presses, see attached diagram. Figure 1-11 The structure shown; Includes oil tank 4, oil pump 5, fan assembly 27 and air-cooling assembly; The air-cooled assembly has a sealed plate-type housing and uses an array of straight-through heat dissipation pipes 14 to exchange heat and cool the hydraulic oil flowing inside the housing. The air-cooled assembly can also turbulent the flow of hydraulic oil to prevent the formation of localized overheating areas. The housing consists of two side plates 1 and a U-shaped frame 8. The two side plates 1 are fixed to both sides of the frame 8 using welding technology, and the material is aluminum or copper. The array of straight-through heat dissipation pipes 14 is fixed between the two side plates 1, and the side walls of the side plates 1 are fixedly connected to the openings of the straight-through heat dissipation pipes 14 through through holes. The straight-through heat dissipation pipes 14 are made of the same material as the housing and are sealed using welding. A sealing plate 13 is fixed inside the housing, forming a sealed oil passage with the side plates 1 and the frame 8. Figure 4 As shown, the sealing plate 13, frame 8 and two side plates 1 form a plate-type shell, and the entire internal space is an oil passage. One end of the oil outlet pipe is located at the lower end of the sealing plate 13. Multiple heat-conducting strips 2 are fixedly connected to the opposite sides of the two side plates 1. The heat-conducting strips 2 are located at the heat dissipation holes. The air collection shroud of the fan assembly 27 is fixed to one side of the housing to deliver airflow to multiple straight heat dissipation pipes 14.

[0023] like Figure 1 , Figure 8 and Figure 9 As shown, when hydraulic oil flows through the housing, the side plate 1, frame 8, multiple straight-through heat dissipation pipes 14 and multiple heat-conducting strips 2 can provide sufficient heat dissipation area. Under the action of ambient airflow, natural cooling is achieved. When the hydraulic oil temperature is high, the fan assembly 27 generates a cold airflow that directly passes through the straight-through heat dissipation pipes 14. Under the action of high-speed airflow, the heat on the side plate 1, straight-through heat dissipation pipes 14 and heat-conducting strips 2 is carried away, achieving air cooling at high temperatures. This can meet the cooling requirements of hydraulic oil under certain ambient temperatures.

[0024] As another design feature, this technical solution also includes a water-cooling component arranged in an orthogonal cross pattern inside the straight heat dissipation pipe 14. The housing is provided with a sealing plate 13, and the water-cooling component is installed on the sealing plate 13 and is arranged in an alternating manner with the straight heat dissipation pipe 14 of the air-cooling component. The water-cooling component uses multiple water-cooling pipes 9 to circulate cooling water and works in conjunction with the air-cooling component to force-cool the hydraulic oil inside the housing, thereby improving the cooling efficiency of the high-temperature hydraulic oil. The water-cooling assembly includes a partition plate 10. The lower ends of multiple water-cooling pipes 9 are fixedly connected to the side wall of the partition plate 10. The partition plate 10 is fixed inside the housing and forms a return cavity with the lower inner wall of the housing. A return pipe is fixedly connected to the lower end of the housing. The side wall of the sealing plate 13 is fixedly connected to the upper end of the multiple water-cooling pipes 9 through the assembly hole. The upper end of the sealing plate 13 is connected to a water distribution assembly for introducing cooling water into the water-cooling assembly and into the water-cooling pipes 9. The multiple water-cooling pipes 9 are arranged in two rows and are staggered. The water-cooling pipes 9 have a wavy structure.

[0025] like Figure 2 , Figure 7 and Figure 9 As shown, an oil distribution plate 25 is fixedly connected inside the housing. The oil outlet of the oil inlet assembly is located at the lower end of the oil distribution plate 25. The side wall of the oil distribution plate 25 is fixedly connected to the wall of the water cooling pipe 9 through the mounting port. The side wall of the oil distribution plate 25 is provided with multiple oil distribution protrusions 26, and the side wall of the oil distribution protrusions 26 is provided with multiple transverse oil distribution holes and multiple longitudinal oil distribution holes. The oil distribution holes on the oil distribution protrusions 26 adopt a gradient design, that is, the hole diameter and flow rate near the oil outlet of the oil inlet assembly are set to the largest size, and the hole farthest away is set to the smallest size. By utilizing the difference in discharge speed and discharge flow rate, the hydraulic oil far away from the discharge pipe can have sufficient flow speed, reducing the area of ​​the flow dead zone.

[0026] When the hydraulic oil enters below the oil distribution plate 25, the hydraulic oil flow resistance in this space is small. Therefore, the hydraulic oil below the oil distribution plate 25 can quickly pass through the multiple transverse and longitudinal oil distribution holes on the oil distribution protrusion 26. As a result, the hot hydraulic oil can be relatively evenly delivered into the oil passage. The hydraulic oil flows directly upward and is mixed under the action of the straight heat dissipation pipe 14 and the water cooling pipe 9, so that the hydraulic oil can fully exchange heat with the cold source and cool down quickly.

[0027] In traditional structures, water cooling and air cooling are usually separate devices or connected in series, with each cooling medium flowing in a closed loop. This technical solution designs a transverse straight-through heat dissipation pipe 14 and a longitudinal water cooling pipe 9 arranged orthogonally within the same plate-type housing, with heat-conducting strips 2 on both sides of the straight-through heat dissipation pipe 14. This creates a three-dimensional crossflow channel between air (transverse blowing) and water (longitudinal flow), where the two do not interfere with each other but jointly impede the flow of hydraulic oil, creating a scouring effect. This achieves simultaneous and coordinated heat exchange of the two media within the same housing.

[0028] Furthermore, the flow path of hydraulic oil differs significantly from that of traditional heat exchangers. Traditional shell-and-tube heat exchangers often allow hydraulic oil to flow axially along the tube bundle or laterally through baffles. This results in a relatively regular path with a small flow cross-section, limited flow volume, high flow velocity, and insufficient heat exchange time, leading to low heat exchange efficiency. This technical solution employs diagonal inlet and outlet, with a gradually changing oil distribution structure at the bottom. This allows the hydraulic oil to enter evenly from the bottom of the shell and exit diagonally, forming a large-scale mixed flow that diagonally penetrates the entire tube bundle area (straight heat dissipation tube 14 and longitudinal water-cooling tube 9) within the shell. This path causes the oil to be continuously divided, turned, and recombined by the vertically intersecting water-cooling and air-cooling tubes during its advance, generating a strong turbulent mixing effect. In contrast, traditional structures often rely on baffles within a limited space in the pipes to achieve flow around the tubes, resulting in a larger pressure drop and a lower degree of mixing compared to the diagonal flushing design of this technical solution.

[0029] This technical solution also includes a water distribution assembly that can supply water to multiple water-cooled pipes in 9 zones. The water distribution assembly is located at the upper end of the housing and has a water inlet area. The water inlet area divides the water-cooled assembly into multiple cooling zones, allowing the water-cooled assembly to adjust the flow of cooling water according to the temperature of the hydraulic oil to achieve different cooling efficiencies. like Figures 5-7As shown, the water distribution assembly includes a rectangular frame 11, with a cross 18 fixedly connected inside the rectangular frame 11. The cross 18 divides the rectangular frame 11 into four rectangular areas, and a first fixed plate 20 and a second fixed plate 17 are fixedly connected to each of the four rectangular areas. The area between the first fixed plate 20 and the second fixed plate 17 is the water distribution area. The side wall of the first fixed plate 20 has a drain outlet that matches the upper end of the water-cooled pipe 9. A guide nozzle 16 is fixedly connected to the upper end of the second fixed plate 17. A three-way pipe 19 is provided at the upper end of the rectangular frame 11. A water inlet pipe is fixedly connected to one end of the three-way pipe 19, and a diversion pipe 15 is fixedly connected to the other two ends of the three-way pipe 19. Two electrically controlled ball valves 12 are fixedly connected to the wall of the diversion pipe 15, and the guide nozzle 16 is fixed to the wall of the diversion pipe 15.

[0030] like Figure 5 and Figure 6 As shown, two branch pipes 15 are installed on a three-way pipe 19, and four electrically controlled ball valves 12 are installed on the two branch pipes 15. The solenoid ball valves 12 are normally closed. When different numbers of solenoid ball valves 12 are opened, for example, when one solenoid ball valve 12 is opened, one-quarter of the water-cooling pipe 9 is circulated with cooling water; when two solenoid ball valves 12 are opened, half of the water-cooling pipe 9 is circulated with cooling water; and so on until all four solenoid ball valves 12 are opened, so that all water-cooling pipes 9 are circulated with cooling water, thereby maximizing the water cooling efficiency. This can be adjusted according to the ambient temperature and hydraulic oil temperature. The system can provide different cooling efficiencies to work in conjunction with the air-cooled components. For example, in summer, all water-cooling pipes 9 can be opened and the power of the external circulating water pump can be maximized. In spring and autumn, one-quarter to three-quarters of the water-cooling pipes can be opened and the power of the external circulating water pump can be reduced. In winter, when the ambient temperature is low, the cooling water and the fan component 27 can be turned off, and the hydraulic oil can be cooled or maintained by natural cooling. This allows the cooler's working mode and cooling efficiency to be adjusted according to the ambient temperature and the hydraulic oil temperature.

[0031] Multiple fixing parts are provided on both the rectangular frame 11 and the cross 18. The fixing parts are fixedly connected to the upper end of the sealing plate 13 by bolts. The upper end of the sealing plate 13 is fitted with a rubber gasket 24 that mates with the rectangular frame 11 and the cross 18. A cover plate 3 is provided on the side wall of the rectangular frame 11. Both ends of the cover plate 3 are provided with fixing feet, which are fixed to the upper end of the housing by bolts. A diverter nozzle 21 is fixedly connected inside the drain outlet. The lower end of the diverter nozzle 21 extends into the upper end of the water-cooling pipe 9 and is provided with two inclined parts 22. The side walls of the two inclined parts 22 are provided with multiple drainage channels 23. The diverter nozzle 21 is designed to balance the inflow and outflow rates in the multiple water-cooling pipes 9, so that the cooling water can provide a relatively balanced cold source in the housing to cool the hydraulic oil.

[0032] This technical solution also includes an active cooling oil inlet assembly. The oil inlet assembly is located at the lower end of the oil tank 4 to directly supply high-temperature hydraulic oil into the housing. It can also use the oil pump 5 to mix the low-temperature hydraulic oil in the oil tank 4 into the housing to achieve mixed cooling, so as to cope with the temperature fluctuation of the high-temperature hydraulic oil and ensure the cooling efficiency of the cooler. One end of the housing is fixedly connected to an oil outlet pipe, and the other end of the housing is connected to the oil tank 4.

[0033] like Figure 1 , Figure 2 , Figure 10 and Figure 11 As shown, the oil inlet assembly includes a housing 7. An oil inlet pipe 31 is fixedly connected to one side of the housing 7, and a cold oil pipe is fixedly connected to the other side of the housing 7. One end of the cold oil pipe is fixed to the lower end of the oil reservoir 4. A one-way valve is installed on the pipe wall of the cold oil pipe. An oil pump 5 is installed on the pipe wall of the cold oil pipe. One end of the housing 7 is provided with a constriction section 35. A mixing chamber 36 is provided on one side of the constriction section 35. When the high-temperature hydraulic oil in the housing 7 and the cold oil in the oil reservoir 4 pass through the constriction section 35 and reach the mixing chamber 36, they form a scattering effect. The Venturi effect is used to mix the hot and cold oils. The homogeneous hydraulic oil stored in the oil reservoir 4 is used to reduce the temperature of the hydraulic oil at extreme temperatures, thereby achieving peak shaving and enabling the cooler to efficiently cool the hydraulic oil. A manifold 30 is fixedly connected to one side of the mixing chamber 36. One end of the manifold 30 is fixedly connected to one side of the housing. A mixing assembly is installed inside the housing 7 and the mixing chamber 36 to force the hydraulic oil entering the housing to mix. The mixing assembly includes an impeller 34, which is disposed in the mixing chamber 36 and has a hollow shaft 28 fixedly connected to its center. One end of the hollow shaft 28 has a flared portion 29, and a transmission frame 32 is fixedly connected to one side of the flared portion 29. A turntable 33 is fixedly connected to one end of the transmission frame 32, and a transmission shaft is fixedly connected to the center of the turntable 33. The shaft wall of the transmission shaft is rotatably connected to one side of the housing 7 through a sealed bearing. A motor 6 is fixedly connected to one side of the housing 7, and the output end of the motor 6 is fixedly connected to one end of the transmission shaft. The motor 6 can directly drive the turntable 33 and the transmission frame 32 to rotate the hollow shaft 28 and the impeller 34. When the impeller 34 rotates, it can agitate the hot and cold hydraulic oil and also play a pushing role. At this time, the hot and cold hydraulic oil in the outer shell 7 is agitated by the transmission frame 32. After being sent into the mixing chamber 36, it is agitated by the impeller 34. Finally, it is diverted into the shell by the transverse oil distribution hole and the longitudinal oil distribution hole on the oil distribution protrusion 26, thereby completing the purpose of mixing and cooling.

[0034] The hybrid cooling scheme designed in this invention fundamentally overturns the traditional hydraulic oil cooling technology that relies on passive heat conduction through solid walls. Instead, it adopts a cooling method of "direct mixing and active neutralization of cold and hot oils." During mixing, cold and hot oils come into direct contact and rely on physical thermal balance rather than heat conduction. Heat exchange is completed in a very short time, eliminating the inherent thermal resistance and thermal inertia of the heat exchanger. This allows the instantaneous temperature peaks generated during the pressurization and holding stage of the forging hydraulic press to be neutralized by the mixed flow before entering the main cooler, solving the problem of "temperature exceeding the limit and insufficient cooling" in traditional solutions.

[0035] Meanwhile, the system's reliability and redundancy are enhanced. For example, when the main cooler's heat dissipation capacity is reduced due to water scaling, fan failure, or high ambient temperature, the mixed cooling system can be put into operation as an independent emergency cooling channel. Relying on the cold oil in the main oil tank, as well as the natural heat dissipation of the main oil tank and the natural heat dissipation effect of the cooler, the hydraulic press can be maintained for short-term continuous operation, avoiding the shutdown of the entire machine due to excessive oil temperature, and buying time for maintenance.

[0036] At the hardware architecture level, existing hydraulic oil temperature control systems typically consist of three parts: a sensor unit, a controller unit, and an execution unit. The sensor unit is centered around temperature sensors, commonly including Pt100 resistance temperature detectors (RTDs) with an accuracy of approximately ±0.1℃, thermocouples, etc. These sensors are installed inside the oil tank or on the inlet and outlet pipes of the cooling circuit, as well as on the inlet pipe, to collect the hot oil temperature. These temperature sensors are used to acquire oil temperature signals in real time. The controller unit is centered around a PLC, working with a temperature controller or PID controller to receive sensor signals, process them, and output control commands. Some systems also include a host computer human-machine interface (HMI) that uses configuration software or VB programming to display temperature curves in real time, set parameters, and manage alarms. The execution unit includes coolers (air-cooled or water-cooled heat exchangers), heaters, solenoid valves, frequency converters, water pumps, and fans, which execute cooling or heating actions according to controller commands. For applications requiring remote monitoring, a GPRS communication module can be added to the PLC to achieve remote transmission of temperature data and remote monitoring of equipment status. In terms of sensor configuration, multi-sensor fusion has become a trend, which not only monitors oil temperature, but also monitors multiple parameters such as cooling water temperature, ambient temperature, and hydraulic press load torque, providing richer input information for control algorithms; In terms of multi-mode cooling control, existing technologies have developed control strategies that switch cooling modes in stages according to temperature ranges. For example, by presetting corresponding thresholds in the controller, and controlling the corresponding number of air coolers to operate based on the range of the measured oil temperature, the cooling air volume of the controlled air coolers corresponds to the cooling air volume required to reduce the oil temperature to the preset temperature, thus realizing the staged adjustment of cooling power and switching between low, medium and high temperature modes. 1. In low-temperature mode, the temperature is controlled by natural heat dissipation or by turning on the fan assembly 27 at low power for air cooling; 2. In medium temperature mode, a high-power fan assembly 27 is used, or the temperature is controlled by using a low-power water cooling system in different zones; 3. In high temperature / ultra-high temperature mode, the full-power fan assembly 27 and the full-power water cooling assembly are used, along with a cold oil mixed cooling scheme, to achieve the highest efficiency in cooling the hydraulic oil under extreme ambient temperature and high power output of the hydraulic press.

[0037] It should be noted that the term "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-throughput hydraulic oil cooler for a forging hydraulic press, comprising an oil reservoir (4), an oil pump (5), and a fan assembly (27), characterized in that, Also includes: The air-cooled assembly has a sealed plate-type shell. The air-cooled assembly uses arrayed straight-through heat dissipation pipes (14) to exchange heat and cool the hydraulic oil flowing inside the shell. The air-cooled assembly can also turbulent the flow of hydraulic oil to avoid the formation of local overheating areas. The water-cooled assembly has a sealing plate (13) on the housing. The water-cooled assembly is installed on the sealing plate (13) and is staggered with the straight heat dissipation pipe (14) of the air-cooled assembly. The water-cooled assembly uses multiple water-cooled pipes (9) to circulate cooling water and works with the air-cooled assembly to force-cool the hydraulic oil in the housing, thereby improving the cooling efficiency of the high-temperature hydraulic oil. The water distribution assembly is located at the upper end of the housing and has a water inlet area. The water inlet area divides the water-cooled assembly into multiple cooling zones, allowing the water-cooled assembly to adjust the flow of cooling water according to the temperature of the hydraulic oil to achieve different cooling efficiencies. The oil inlet assembly is located at the lower end of the oil storage tank (4) and is used to directly deliver high-temperature hydraulic oil into the housing. It can also use the oil pump (5) to mix the low-temperature hydraulic oil in the oil storage tank (4) into the housing to achieve mixing and cooling, so as to cope with the temperature fluctuation of the high-temperature hydraulic oil and ensure the cooling efficiency of the cooler. One end of the housing is fixedly connected to the oil outlet pipe, and the other end of the housing is connected to the oil storage tank (4).

2. A high-throughput hydraulic oil cooler for a forging hydraulic press according to claim 1, characterized in that: The housing consists of two side plates (1) and a U-shaped frame (8). The two side plates (1) are fixed on both sides of the frame (8). The array of straight heat dissipation pipes (14) is fixed between the two side plates (1). The side wall of the side plate (1) is fixedly connected to the pipe opening of the straight heat dissipation pipe (14) through a through hole. The sealing plate (13) is fixed inside the housing and forms a sealed oil passage with the side plates (1) and the frame (8). One end of the oil outlet pipe is located at the lower end of the sealing plate (13). Multiple heat-conducting strips (2) are fixedly connected to the opposite sides of the two side plates (1). The heat-conducting strips (2) are located at the heat dissipation holes. The air collection shroud of the fan assembly (27) is fixed to one side of the housing to deliver airflow to multiple straight heat dissipation pipes (14).

3. A high-flow-rate hydraulic oil cooler for a forging hydraulic press according to claim 1, characterized in that: The water-cooling assembly includes a partition (10), and the lower ends of multiple water-cooling pipes (9) are fixedly connected to the side wall of the partition (10). The partition (10) is fixed inside the housing and forms a reflux chamber with the lower inner wall of the housing. A reflux pipe is fixedly connected to the lower end of the housing. The side wall of the sealing plate (13) is fixedly connected to the upper end of the multiple water-cooling pipes (9) through the assembly hole. The upper end of the sealing plate (13) is connected to a water distribution assembly for introducing cooling water into the water-cooling pipes (9) into the water-cooling assembly. The multiple water-cooling pipes (9) are arranged in two rows and staggered. The water-cooling pipes (9) have a wavy structure.

4. A high-flow-rate hydraulic oil cooler for a forging hydraulic press according to claim 1, characterized in that: An oil distribution plate (25) is fixedly connected inside the housing. The oil outlet of the oil inlet assembly is located at the lower end of the oil distribution plate (25). The side wall of the oil distribution plate (25) is fixedly connected to the wall of the water cooling pipe (9) through the installation port. The side wall of the oil distribution plate (25) is provided with multiple oil distribution protrusions (26), and the side wall of the oil distribution protrusions (26) is provided with multiple transverse oil distribution holes and multiple longitudinal oil distribution holes.

5. A high-flow-rate hydraulic oil cooler for a forging hydraulic press according to claim 1, characterized in that: The water distribution assembly includes a rectangular frame (11), in which a cross (18) is fixedly connected. The cross (18) divides the rectangular frame (11) into four rectangular areas, and a first fixed plate (20) and a second fixed plate (17) are fixedly connected in each of the four rectangular areas. The side wall of the first fixed plate (20) is provided with a drain outlet that matches the upper end of the water-cooled pipe (9). A guide nozzle (16) is fixedly connected to the upper end of the second fixed plate (17). A three-way pipe (19) is provided at the upper end of the rectangular frame (11). A water inlet pipe is fixedly connected to one end of the three-way pipe (19), and a diversion pipe (15) is fixedly connected to the other two ends of the three-way pipe (19). Two electrically controlled ball valves (12) are fixedly connected to the wall of the diversion pipe (15), and the guide nozzle (16) is fixed to the wall of the diversion pipe (15).

6. A high-throughput hydraulic oil cooler for a forging hydraulic press according to claim 5, characterized in that: Multiple fixing parts are provided on both the rectangular frame (11) and the cross (18). The fixing parts are fixedly connected to the upper end of the sealing plate (13) by bolts. The upper end of the sealing plate (13) is fitted with a rubber gasket (24) that matches the rectangular frame (11) and the cross (18). The side wall of the rectangular frame (11) is provided with a cover plate (3). Both ends of the cover plate (3) are provided with fixing feet. The fixing feet are fixed to the upper end of the shell by bolts.

7. A high-throughput hydraulic oil cooler for a forging hydraulic press according to claim 5, characterized in that: A diverter nozzle (21) is fixedly connected inside the drain outlet. The lower end of the diverter nozzle (21) extends into the upper end of the water-cooling pipe (9) and is provided with two inclined parts (22). Multiple drainage channels (23) are opened on the side walls of the two inclined parts (22).

8. A high-flow-rate hydraulic oil cooler for a forging hydraulic press according to claim 1, characterized in that: The oil inlet assembly includes a housing (7), an oil inlet pipe (31) is fixedly connected to one side of the housing (7), a cold oil pipe is fixedly connected to the other side of the housing (7), one end of the cold oil pipe is fixed to the lower end of the oil storage tank (4), a one-way valve is installed on the pipe wall of the cold oil pipe, the oil pump (5) is installed on the pipe wall of the cold oil pipe, one end of the housing (7) is provided with a constriction part (35), a mixing chamber (36) is provided on one side of the constriction part (35), a manifold (30) is fixedly connected to one side of the mixing chamber (36), and one end of the manifold (30) is fixedly connected to one side of the housing; The housing (7) and the mixing chamber (36) are equipped with a mixing assembly for forcibly mixing the hydraulic oil entering the housing.

9. A high-throughput hydraulic oil cooler for a forging hydraulic press according to claim 8, characterized in that: The mixing assembly includes an impeller (34), which is disposed in a mixing chamber (36) and has a hollow shaft (28) fixedly connected at its center. One end of the hollow shaft (28) is provided with a flared portion (29), and a transmission frame (32) is fixedly connected to one side of the flared portion (29). One end of the transmission frame (32) is fixedly connected to a turntable (33), and a transmission shaft is fixedly connected at the center of the turntable (33). The shaft wall of the transmission shaft is rotatably connected to one side of the housing (7) through a sealed bearing. A motor (6) is fixedly connected to one side of the housing (7), and the output end of the motor (6) is fixedly connected to one end of the transmission shaft.

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