Heat dissipation structure of a hydraulic pump station

Abstract

The invention relates to a heat dissipation structure of a hydraulic pump station, comprising a two-stage compression cooling system driven by the residual pressure of the hydraulic pump station, a high-pressure heat dissipation pipe, a cold storage box and an automatic temperature control device, wherein compression pistons are arranged in the first-stage and second-stage compression tanks, and automatic pressure relief and reset are realized by a switch ring and a switch rod; the compression piston drives an external lifting plate through a permanent magnet to force air cooling of the high-pressure heat dissipation pipe; the cooling medium enters the cold storage box after passing through an expansion valve to cool the oil tank; a thermally responsive shape memory alloy material is arranged between the oil tank and the cold storage layer to realize automatic oil temperature regulation, utilize the residual pressure of the hydraulic system, and save energy and be efficient; the two-stage compression improves the heat dissipation efficiency; the automatic pressure relief and reset ensures continuous and reliable operation; the forced heat dissipation accelerates the cooling speed; the cold storage design smoothes the temperature fluctuation; the thermally responsive material realizes automatic temperature control, and the invention has the characteristics of energy saving, high efficiency, reliability, intelligence, etc., and can be widely used in the heat dissipation and cooling of hydraulic systems.

Description

Technical Field

[0001] The invention relates to a heat dissipation structure of a hydraulic pump station, in particular to a heat dissipation structure of a hydraulic pump station applied in the field of hydraulic technology. Background Art

[0002] The heat dissipation structure of hydraulic pump station is mainly used in medium and large power hydraulic equipment such as engineering machinery, injection molding machines, die-casting machines, forging machines, etc. These equipment generally have the problems of increased hydraulic oil temperature and difficulty in heat dissipation, which seriously affects the efficiency and reliability of the system. Therefore, an efficient, compact and intelligent heat dissipation cooling solution is urgently needed.

[0003] The specification of Chinese invention patent CN113883132 discloses a hydraulic pump station, including an oil inlet pipe, an oil outlet pipe, a connecting pipe, a cooling assembly and a filter assembly, wherein the oil inlet pipe and the oil outlet pipe are respectively fixedly connected to the two ends of the connecting pipe, and a filter assembly is arranged inside the connecting pipe, and the cooling assembly is arranged between the oil inlet pipe and the oil outlet pipe. The present invention, by arranging a cooling assembly, uses a water inlet pipe to introduce water flow into the interior of the cooling pipe, and the water flow is discharged through the water outlet pipe, so that the hydraulic oil entering the connecting pipe through the oil inlet pipe is cooled by the water flow flowing inside the cooling pipe, thereby reducing the probability of the hydraulic pump station affecting the normal operation of the equipment due to the excessive temperature of the hydraulic oil, and improving the working efficiency of the device, and by arranging a plurality of groups of protrusions connected between the cooling pipe and the connecting pipe in an equidistant annular shape, the hydraulic oil can be diverted and cooled, and the contact area between the interior of the cooling pipe and the hydraulic oil is increased, thereby improving the cooling effect of the hydraulic oil.

[0004] The specification of Chinese invention patent CN104047930 discloses a highly integrated hydraulic pump station, which is characterized by comprising a box body, a motor, a hydraulic oil pump and a control box. The interior of the box body is divided into an oil tank and an electrical box for holding hydraulic oil by a partition. The control box is arranged in the electrical box, and the motor and the hydraulic oil pump are sealed and connected and arranged in the oil tank. A through-type air cooler is arranged in the oil tank, and the two ends of the through-type air cooler are respectively arranged on the partition and the oil tank wall opposite to the partition on the oil tank. A fan is arranged at one end of the two ends of the through-type air cooler, and an air guide hole is arranged on the electrical box wall of the electrical box. An oil return port for inserting an oil return pipe is arranged on the oil tank wall adjacent to the partition on the oil tank, and a leak-proof device is arranged on the oil return port. The advantages are that the volume of the product is greatly reduced, and the installation and cleaning of the product are greatly facilitated; the cooling effect is good, the noise is small, the cost is low, the oil absorption efficiency is higher, it can be produced in a factory, and can be easily installed in injection molding machines, die-casting machines, hydraulic presses and various equipment and workplaces using hydraulic pump stations.

[0005] The above design cools the hydraulic oil by internal water cooling and air cooling, which solves the problem of hydraulic oil temperature rise to a certain extent. However, it still has certain limitations. For example, the cooling effect is limited by the cooling water temperature and the ambient temperature, and it is difficult to meet the heat dissipation requirements under high temperature and high power conditions; it lacks cold storage and adaptive temperature control functions, and it is difficult to cope with fluctuations in load and ambient temperature. Summary of the invention

[0006] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is how to provide an efficient, compact and intelligent heat dissipation structure of a hydraulic pump station to significantly improve the heat dissipation performance of the hydraulic system and enhance the reliability and economy of the equipment.

[0007] In order to solve the above problems, the present invention provides a heat dissipation structure of a hydraulic pump station, including a first-stage compression tank, a connecting pipe is fixedly connected to the bottom of the first-stage compression tank, the connecting pipe is fixedly connected to the second-stage compression tank at one end away from the first-stage compression tank, an oil inlet pipe is fixedly connected to the top of the first-stage compression tank and the second-stage compression tank, the oil inlet pipe is connected to the hydraulic pump station, a high-pressure heat dissipation pipe is fixedly connected to the bottom of the second-stage compression tank, an expansion valve is fixedly connected to the end of the high-pressure heat dissipation pipe away from the second-stage compression tank, and a cooling box is fixedly connected to the end of the expansion valve away from the high-pressure heat dissipation pipe, a cold storage layer is fixedly connected to the inner wall of the cold storage layer, an oil tank is fixedly connected to the heat insulation layer, a plurality of thermally responsive shape memory alloys are fixedly connected between the heat insulation layer and the oil tank, and a cooling medium is filled in the high-pressure heat dissipation pipe.

[0008] As a further improvement of the present application, compression pistons are slidably connected inside the first-stage compression tank and the second-stage compression tank, and switch rings are provided on the upper sides of the compression pistons. The outer ends of the multiple switch rings are slidably connected to the inner walls of the first-stage compression tank and the second-stage compression tank, respectively.

[0009] As a further improvement of the present application, the bottom ends of the multiple switch rings are fixedly connected with switch rods, the ends of the multiple switch rods away from the switch rings all penetrate the compression piston, and the penetrating parts are all provided with bosses.

[0010] As a further improvement of the present application, sealing rings are fixedly connected between the multiple compression pistons and the primary compression tank and the secondary compression tank, as well as between the multiple switch rings.

[0011] As another improvement of the present application, an oil drain pipe is fixedly connected to the outer ends of the first-stage compression tank and the second-stage compression tank at the corresponding positions of the switch ring, and multiple oil drain pipes are interconnected and arranged away from one end of the first-stage compression tank and the second-stage compression tank, and the interconnected parts are fixedly connected to the top of the oil tank.

[0012] As another improved supplement to the present application, a return spring is fixedly connected between the bottom end of the compression piston in the first-stage compression tank and the bottom end inside the first-stage compression tank, and the return spring is in a free state after installation.

[0013] As another improved supplement to the present application, a cooling medium return pipe is fixedly connected to the bottom end of the first-stage compression tank, and the cooling medium return pipe is fixedly connected to the bottom end of the cooling box at one end away from the first-stage compression tank, and a one-way valve is fixedly connected to the connecting pipe, the high-pressure heat dissipation pipe and the cooling medium return pipe.

[0014] As another improvement of the present application, multiple permanent magnets are fixedly connected to multiple compression pistons, and lifting plates are slidably connected to the outer ends of the first-stage compression tank and the second-stage compression tank at the corresponding positions of the compression pistons, and multiple lifting plates are also fixedly connected to one end of the compression pistons, and the permanent magnets on the lifting plates and the permanent magnets on the compression pistons are arranged to attract each other.

[0015] The steps include:

[0016] S1, residual pressure drive;

[0017] S2, first-stage compression;

[0018] S3, secondary compression;

[0019] S4, automatic pressure relief reset;

[0020] S5, forced heat dissipation;

[0021] S6, automatic heat storage;

[0022] S7, automatic cooling.

[0023] In summary, this application has the following beneficial effects:

[0024] 1. Use the residual pressure of the hydraulic system to drive heat dissipation, which is energy-saving and efficient; the heat dissipation structure cleverly uses the residual pressure of the hydraulic pump station itself as the driving force, and pushes the cooling medium to circulate in the system through the compression piston to achieve heat dissipation and cooling, avoiding additional power sources, making full use of the system's own energy, and having a significant energy-saving effect. At the same time, the residual pressure drive method also makes the heat dissipation process more continuous and efficient.

[0025] 2. Two-stage compression design improves heat dissipation efficiency. The two-stage compression design with a primary compression tank and a secondary compression tank can significantly improve the compression ratio of the cooling medium, so that it can obtain a larger pressure difference and flow rate in the high-pressure heat dissipation pipe, and enhance the heat dissipation and heat transfer effect. The two-stage compression can also reduce the pressure variation range of the single-stage compression, making the system run more smoothly.

[0026] 3. Automatic pressure relief and reset to achieve continuous and reliable operation: The switch ring and switch rod are set on the compression piston, which can automatically open the oil drain pipe when the piston reaches the bottom dead center, release the hydraulic oil pressure, and achieve automatic pressure relief and reset. With the action of the reset spring, the compression piston can quickly reset after pressure relief and enter the next working cycle. This automated design enables the cooling system to operate continuously and reliably for a long time, reducing manual operation and maintenance.

[0027] 4. Forced heat dissipation design accelerates the heat dissipation of the cooling medium; by setting a permanent magnet and a lifting plate between the compression piston and the shell, the reciprocating motion of the compression piston is used to drive the lifting plate to move up and down, and the air around the high-pressure heat dissipation pipe is forced to be disturbed, which significantly accelerates the convection heat exchange between the heat dissipation pipe surface and the air, improves the heat dissipation rate of the cooling medium, and further enhances the heat dissipation effect.

[0028] 5. Cold storage design to smooth out temperature fluctuations during heat dissipation. A cold storage layer is provided in the cooling box to continuously store cold energy during the continuous operation of the system. When the temperature of the hydraulic oil in the tank rises, the stored cold energy can be released in time to smooth out the temperature fluctuations during the heat dissipation process, making the system cooling effect more balanced and stable. The cold storage design can also use the stored cold energy to extend the time the oil tank keeps a low temperature when the heat dissipation system is suspended.

[0029] 6. Application of thermally responsive shape memory alloy materials to achieve automatic temperature control; thermally responsive shape memory alloy materials are set between the oil tank and the cold storage layer. When the temperature of the oil tank rises, the material automatically expands and conducts heat, transferring the heat to the cold storage layer for cooling; when the oil temperature drops to the set value, the material contracts and disconnects the heat transfer to avoid overcooling of the hydraulic oil. The adaptive thermal response characteristics realize the automatic adjustment and control of the hydraulic oil temperature, reduce manual intervention, and improve the intelligence level of the system.

[0030] 7. Compact and integrated modular cooling system; the entire cooling system integrates compression, expansion, heat exchange, cold storage, and automatic temperature control. It has a small and compact size and is easy to integrate into hydraulic pump stations and other equipment. The system structure and work flow have also been optimized to coordinate and cooperate with each other, achieving a high degree of integration of the cooling process and facilitating practical applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is the overall structure diagram of this application;

[0032] Figure 2 A top view of the present application;

[0033] Figure 3 The working status of this application Figure 1 ;

[0034] Figure 4 The working status of this application Figure 2 ;

[0035] Figure 5 Explosion for this application Figure 1 ;

[0036] Figure 6 Explosion for this application Figure 2 ;

[0037] Figure 7 Explosion for this application Figure 3 ;

[0038] Figure 8 Explosion for this application Figure 4 ;

[0039] Fig. 9 Explosion for this application Figure 5 ;

[0040] Fig.10 This is the appearance structure diagram of this application.

[0041] Description of the numbers in the figure:

[0042] 1. Primary compression tank; 2. Connecting pipe; 3. Secondary compression tank; 4. Oil inlet pipe; 5. High-pressure heat dissipation pipe; 6. Cooling box; 7. Cold storage layer; 8. Insulation layer; 9. Oil tank; 10. Thermally responsive shape memory alloy; 11. Compression piston; 12. Switch ring; 13. Switch rod; 14. Oil drain pipe; 15. Return spring; 16. Cooling medium return pipe; 17. Lifting plate. DETAILED DESCRIPTION

[0043] Three implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0044] The first implementation method:

[0045] Figure 1-Figure 10 Shown.

[0046] A heat dissipation structure of a hydraulic pump station comprises a primary compression tank 1, a connecting pipe 2 is fixedly connected to the bottom of the primary compression tank 1, a secondary compression tank 3 is fixedly connected to the end of the connecting pipe 2 away from the primary compression tank 1, an oil inlet pipe 4 is fixedly connected to the top of the primary compression tank 1 and the secondary compression tank 3, the oil inlet pipe 4 is connected to the hydraulic pump station, a high-pressure heat dissipation pipe 5 is fixedly connected to the bottom of the secondary compression tank 3, an expansion valve is fixedly connected to the end of the high-pressure heat dissipation pipe 5 away from the secondary compression tank 3, and a cooling box 6 is fixedly connected to the end of the expansion valve away from the high-pressure heat dissipation pipe 5, a cold storage layer 7 is fixedly connected in the cooling box 6, a heat insulation layer 8 is fixedly connected to the inner wall of the cold storage layer 7, an oil tank 9 is fixedly connected in the heat insulation layer 8, a plurality of thermally responsive shape memory alloys 10 are fixedly connected between the heat insulation layer 8 and the oil tank 9, and a cooling medium is filled in the high-pressure heat dissipation pipe 5.

[0047] The bottom of the primary compression tank 1 is fixedly connected with a connecting pipe 2 by welding, bolt connection, etc., and the end of the connecting pipe 2 away from the primary compression tank 1 is fixedly connected with the secondary compression tank 3 by welding, bolt connection, etc., and the tops of the primary compression tank 1 and the secondary compression tank 3 are fixedly connected with an oil inlet pipe 4 by welding, and the other end of the oil inlet pipe 4 is connected to the oil circuit of the hydraulic pump station, so that the return oil of the hydraulic pump station can flow into the primary compression tank 1 and the secondary compression tank 3.

[0048] The bottom end of the secondary compression tank 3 is fixedly connected to a high-pressure heat dissipation pipe 5 by welding. The high-pressure heat dissipation pipe 5 is in the form of multiple strands of thin tubes in parallel or in a coil, and a plurality of fins are fixedly connected to the outer end of the high-pressure heat dissipation pipe 5 to increase the heat dissipation area. The end of the high-pressure heat dissipation pipe 5 away from the secondary compression tank 3 is fixedly connected to an expansion valve and a cooling box 6 by welding in sequence. The expansion valve is used to reduce the pressure of the high-pressure cooling medium after the secondary compression, so that it evaporates and absorbs heat in the cooling box 6, thereby cooling the oil tank 9.

[0049] The cooling box 6 adopts a double-layer jacket structure, the inner layer is an oil tank 9, the outer layer is a cold storage layer 7, and an insulating layer 8 is provided between the two. The cold storage layer 7 adopts high specific heat capacity materials such as water and ethylene glycol solution to store cold energy. The insulating layer 8 adopts materials such as aluminum silicate and polyurethane foam to thermally isolate the cold storage layer 7 from the oil tank 9 and reduce cold energy loss. The oil tank 9 is used to store the hydraulic oil required for the operation of the hydraulic pump station.

[0050] A plurality of thermally responsive shape memory alloys 10 are evenly and fixedly connected between the thermal insulation layer 8 and the oil tank 9. The shape memory alloys are made of nickel-titanium memory alloy wires. When the temperature of the hydraulic oil in the oil tank 9 exceeds a set value, such as 60°C, the memory alloy wires shrink and deform, so that the thermal insulation layer 8 and the cold storage layer 7 are in close contact, and the heat of the hydraulic oil can be conducted to the cold storage layer 7 and absorbed; when the temperature of the hydraulic oil drops below the set value, the memory alloy wires return to their original state, so that the thermal insulation layer 8 and the cold storage layer 7 are separated, and the oil tank 9 and the cold storage layer 7 are insulated.

[0051] The high-pressure heat dissipation pipe 5 is filled with refrigerant such as R134a as a cooling medium, which circulates along the system driven by the residual pressure of the pump station, continuously absorbs the heat of the hydraulic oil, and then dissipates the heat outward through the high-pressure heat dissipation pipe 5, thereby realizing continuous heat transfer.

[0052] When the hydraulic pump station is working, the return oil enters the primary compression tank 1 and the secondary compression tank 3 through the oil inlet pipe 4, and the compression piston 11 is pushed downward by the residual pressure of the hydraulic oil to compress the cooling medium in the tank;

[0053] The cooling medium after primary compression enters the secondary compression tank 3 through the connecting pipe 2, is compressed to a high pressure state again, and then discharged through the high pressure heat dissipation pipe 5. At the same time, the heat is dissipated from the air around the high pressure heat dissipation pipe 5, so that the temperature of the cooling medium decreases;

[0054] After the high-pressure cooling medium is throttled and depressurized by the expansion valve, it enters the evaporating coil in the cooling box 6, absorbs the heat of the hydraulic oil in the oil tank 9, and reduces the temperature of the hydraulic oil;

[0055] The evaporated cooling medium returns to the primary compression tank 1 through the cooling medium return pipe 16, completing the cycle;

[0056] When the ambient temperature is low or the load of the pump station is small, the evaporation of the cooling medium in the cooling box 6 is reduced, and the cold storage layer 7 can continuously store cold; when the ambient temperature rises or the load increases, the cold storage layer 7 releases cold energy to smooth the fluctuation of the cooling capacity;

[0057] When the hydraulic oil temperature exceeds the set value, the thermally responsive shape memory alloy 10 shrinks and deforms, so that the thermal insulation layer 8 and the cold storage layer 7 are in close contact, and the heat in the oil tank 9 can be efficiently transferred to the cold storage layer 7 for cooling; when the hydraulic oil temperature drops below the set value, the thermally responsive shape memory alloy 10 returns to its original state, and the thermal insulation layer 8 blocks the heat transfer between the oil tank 9 and the cold storage layer 7 to prevent the hydraulic oil from being overcooled.

[0058] Two-stage compression is used to increase the heat dissipation temperature difference of the cooling medium, the cold storage layer 7 is used to smooth the heat dissipation load, and the oil temperature is adaptively adjusted through the thermally responsive shape memory alloy 10, which effectively solves the problems of insufficient heat dissipation, large oil temperature fluctuations, and bulky systems of existing hydraulic equipment, realizes efficient, compact, and intelligent hydraulic oil cooling, and improves the working performance and reliability of the hydraulic pump station.

[0059] The second implementation method:

[0060] Figure 1-Figure 10 Shown.

[0061] A compression piston 11 is slidably connected inside the primary compression tank 1 and the secondary compression tank 3. A switch ring 12 is provided on the upper side of the compression piston 11. The outer ends of the multiple switch rings 12 are slidably connected to the inner walls of the primary compression tank 1 and the secondary compression tank 3 respectively.

[0062] The bottom ends of the multiple switch rings 12 are all fixedly connected with switch rods 13. The ends of the multiple switch rods 13 away from the switch rings 12 all penetrate the compression piston 11, and the penetrating parts are all provided with bosses.

[0063] Sealing rings are fixedly connected between the multiple compression pistons 11 and the primary compression tank 1 and the secondary compression tank 3 , as well as between the multiple switch rings 12 .

[0064] The outer ends of the first-stage compression tank 1 and the second-stage compression tank 3 are fixedly connected to the positions corresponding to the switch ring 12 with oil drain pipes 14. Multiple oil drain pipes 14 are connected to each other at one end away from the first-stage compression tank 1 and the second-stage compression tank 3, and the interconnected parts are fixedly connected to the top of the oil tank 9.

[0065] A return spring 15 is fixedly connected between the bottom end of the compression piston 11 in the first-stage compression tank 1 and the bottom end inside the first-stage compression tank 1. The return spring 15 is in a free state after installation.

[0066] A cooling medium return pipe 16 is fixedly connected to the bottom end of the first-stage compression tank 1. The end of the cooling medium return pipe 16 away from the first-stage compression tank 1 is fixedly connected to the bottom end of the cooling box 6. A one-way valve is fixedly connected to the connecting pipe 2, the high-pressure heat dissipation pipe 5 and the cooling medium return pipe 16.

[0067] Multiple permanent magnets are fixedly connected to the multiple compression pistons 11, and lifting plates 17 are slidably connected to the outer ends of the first-stage compression tank 1 and the second-stage compression tank 3 at the corresponding positions of the compression piston 11, and multiple lifting plates 17 are also fixedly connected to one end of the compression piston 11, and the permanent magnets on the lifting plates 17 and the permanent magnets on the compression piston 11 are arranged to attract each other.

[0068] A compression piston 11 is slidably connected in both the primary compression tank 1 and the secondary compression tank 3. The compression piston 11 is made of lightweight and wear-resistant materials such as aluminum alloy, and its surface is hard anodized to reduce friction and wear with the inner wall of the compression tank. A switch ring 12 is provided on the upper side of the compression piston 11. The switch ring 12 is made of alloy steel with good elasticity, and its outer end maintains sliding contact with the inner wall of the primary compression tank 1 and the secondary compression tank 3. The switch ring 12 can move in the compression tank to adapt to the reciprocating motion of the compression piston 11.

[0069] A switch rod 13 is fixedly connected to the bottom end of each switch ring 12 by screws. The end of the switch rod 13 away from the switch ring 12 penetrates the compression piston 11 from the top of the compression piston 11, and a truncated cone-shaped boss is provided on the penetration part. When the compression piston 11 descends to the bottom dead center, the boss on the switch rod 13 will push the switch ring 12 to move downward to open the oil drain pipe 14; when the compression piston 11 moves upward to reset, the boss on the switch rod 13 is separated from the compression piston 11, and the switch ring 12 moves upward under the pressure of the spring or the cooling medium to close the oil drain pipe 14.

[0070] In order to ensure the sealing between the compression piston 11 and the inner wall of the compression tank and the switch ring 12, O-rings are provided on the outer circumferential surface of the compression piston 11 and the inner circumferential surface of the switch ring 12. The O-rings are made of oil-resistant and wear-resistant elastic materials such as nitrile rubber. The sealing rings are embedded in the annular grooves on the surfaces of the piston and the switch ring 12 to play a leak-proof sealing role.

[0071] On the outer wall of the primary compression tank 1 and the secondary compression tank 3, an oil drain pipe 14 is fixedly connected by welding at the position corresponding to the switch ring 12. The multiple oil drain pipes 14 are gathered together at one end away from the primary compression tank 1 and the secondary compression tank 3, and are fixedly connected to the top of the oil tank 9 by welding. When the switch ring 12 opens the oil drain pipe 14, the hydraulic oil in the compression tank can be discharged into the oil tank 9 through the oil drain pipe 14.

[0072] In order to enable the compression piston 11 to automatically reset after pressure relief, a reset spring 15 is arranged between the bottom end of the compression piston 11 in the first-stage compression tank 1 and the inner bottom end of the first-stage compression tank 1. The reset spring 15 adopts a disc spring with a large compression margin and is in a free state when installed. When the compression piston 11 moves downward to the bottom dead center, the reset spring 15 is compressed; when the switch ring 12 opens the oil drain pipe 14 to relieve pressure, the elastic force of the reset spring 15 can push the compression piston 11 upward to reset. There is no reset spring 15 in the second-stage compression tank 3, and the reset of the compression piston 11 is achieved by the pressure of the cooling medium after the first-stage compression.

[0073] A cooling medium return pipe 16 is fixedly connected to the bottom of the primary compression tank 1 by welding. The end of the cooling medium return pipe 16 away from the primary compression tank 1 is connected to the bottom of the cooling box 6, so that the evaporated low-pressure cooling medium can return to the primary compression tank 1 through the cooling medium return pipe 16 to achieve recycling. In order to prevent the cooling medium from flowing back, a one-way valve is welded in the connecting pipe 2, the high-pressure heat dissipation pipe 5 and the cooling medium return pipe 16. A spring ball valve and other structural forms are adopted to ensure that the cooling medium flows in one direction in the system.

[0074] In order to strengthen the convection heat exchange between the high-pressure heat dissipation pipe 5 and the air, a plurality of NdFeB permanent magnets are fixedly connected to each compression piston 11 by adhesive, and are distributed in the circumferential and axial directions of the outer cylindrical surface of the compression piston 11. On the outer walls of the first-stage compression tank 1 and the second-stage compression tank 3, an annular lifting plate 17 is also slidably connected at the position corresponding to the compression piston 11. On the side of each lifting plate 17 close to the compression piston 11, a plurality of NdFeB permanent magnets are also glued, and their polarities are attracted to the polarities of the permanent magnets on the compression piston 11. When the compression piston 11 reciprocates up and down in the compression tank, the permanent magnets on the piston can drive the lifting plate 17 to move up and down synchronously through magnetic force. The lifting plate 17 then accelerates the flow of air around the high-pressure heat dissipation pipe 5 through the windshield effect, thereby strengthening the heat dissipation and heat exchange.

[0075] The third implementation method:

[0076] Figure 1-Figure 10 Shown.

[0077] The steps include:

[0078] S1, residual pressure drive;

[0079] When the hydraulic pump station is in use, when there is residual pressure in the refluxed hydraulic oil, the residual pressure of the hydraulic oil enters the primary compression tank 1 and the secondary compression tank 3 through the oil inlet pipe 4, and the hydraulic oil pushes the multiple compression pistons 11 to move downward;

[0080] S2, first-stage compression;

[0081] During installation, the cooling medium has a certain pressure in both the primary compression tank 1 and the secondary compression tank 3, and the pressure in the secondary compression tank 3 is greater than the pressure in the primary compression tank 1, so that the compression piston 11 in the primary compression tank 1 compresses the cooling medium when moving downward, so that the cooling medium enters the secondary compression tank 3 through the connecting pipe 2, and the primary compression is realized;

[0082] S3, secondary compression;

[0083] The hydraulic oil enters the secondary compression tank 3 through the oil inlet pipe 4. At this time, the hydraulic oil pushes the multiple compression pistons 11 to move downward so that the cooling medium passes through the secondary compression tank 3 and enters the high-pressure heat dissipation pipe 5, thereby realizing secondary compression;

[0084] S4, automatic pressure relief reset;

[0085] When the multiple compression pistons 11 move downward to the lower dead center, they push the switch rod 13 to move, and the switch rod 13 drives the switch ring 12 to move. The movement of the switch ring 12 opens the corresponding oil drain pipe 14, so that the hydraulic oil in the first-stage compression tank 1 and the second-stage compression tank 3 flows from the oil drain pipe 14 into the oil tank 9. When the pressure at the top of the compression piston 11 decreases, the compression piston 11 moves upward again until the compression piston 11 moves to the upper dead center. At this time, the compression piston 11 pushes the switch ring 12 matched with it to move upward, and the switch ring 12 closes the corresponding oil drain pipe 14 again. At this time, the pressure at the top of the compression piston 11 starts to rise and pushes the compression piston 11 downward again;

[0086] When the oil drain pipe 14 on the first-stage compression tank 1 is opened, the pressure at the top of the compression piston 11 in the first-stage compression tank 1 is reduced. At this time, the compression piston 11 in the first-stage compression tank 1 is pushed upward by the elastic force of the return spring 15;

[0087] When the cooling medium in the primary compression tank 1 enters the secondary compression tank 3, the oil drain pipe 14 on the secondary compression tank 3 is in an open state, and the compression piston 11 in the secondary compression tank 3 moves upward under the pressure of the cooling medium until the compression piston 11 in the secondary compression tank 3 pushes the matching switch ring 12 to close the corresponding oil drain pipe 14, and then the compression piston 11 in the secondary compression tank 3 starts to move downward under the pressure of the hydraulic oil;

[0088] S5, forced heat dissipation;

[0089] The cooling medium enters the cooling box 6 from the high-pressure heat dissipation pipe 5 through the expansion valve, and then the cooling medium flows back from the cooling box 6 to the bottom end of the first-stage compression tank 1 through the cooling medium return pipe 16. During the up and down movement of the multiple compression pistons 11, the lifting plate 17 connected thereto is driven by magnetic force to move up and down. During the up and down movement of the lifting plate 17, the air around the high-pressure heat dissipation pipe 5 is forced to flow;

[0090] S6, automatic heat storage;

[0091] During use, the residual pressure of the hydraulic oil continuously compresses the cooling medium to circulate, and the cold storage layer 7 continuously stores the cold energy;

[0092] S7, automatic cooling;

[0093] When the temperature of the hydraulic oil in the oil tank 9 increases, the multiple thermal response shape memory alloys 10 connected to the oil tank 9 expand in volume. After the volume expansion, the thermal response shape memory alloys 10 contact the inner wall of the cold storage layer 7 and conduct the heat to the cold storage layer 7, thereby cooling the hydraulic oil in the oil tank 9.

[0094] When the temperature of the hydraulic oil in the oil tank 9 drops to a certain level, the multiple thermally responsive shape memory alloys 10 shrink in volume, and the multiple thermally responsive shape memory alloys 10 interrupt the heat transfer with the cold storage layer 7, so that the hydraulic oil is not easily too cold.

[0095] Residual pressure drive: when the hydraulic pump station works normally, the hydraulic oil in the return oil pipe has a certain residual pressure. By using this residual pressure, the hydraulic oil is introduced into the primary compression tank 1 and the secondary compression tank 3 through the oil inlet pipe 4. Under the action of the residual pressure, the compression piston 11 overcomes the pressure of the cooling medium and moves downward to compress the cooling medium.

[0096] In the first-stage compression, in the initial state, the cooling medium is pre-charged to a certain pressure in both the first-stage compression tank 1 and the second-stage compression tank 3, and the pressure in the second-stage compression tank 3 is higher than that in the first-stage compression tank 1. When the compression piston 11 in the first-stage compression tank 1 moves downward under the drive of the residual pressure of the hydraulic oil, the cooling medium in the tank is compressed and the pressure increases. When the pressure exceeds the pressure in the second-stage compression tank 3, the cooling medium is pushed into the second-stage compression tank 3 through the connecting pipe 2 to achieve the first-stage compression.

[0097] In the secondary compression, the hydraulic oil continuously enters the secondary compression tank 3 through the oil inlet pipe 4, pushing the compression piston 11 inside it to continue to move downward. The compression action of the piston further increases the pressure of the cooling medium that has undergone the primary compression, and finally enters the high-pressure heat dissipation pipe 5 from the secondary compression tank 3 to complete the secondary compression process. At this time, the cooling medium reaches the designed maximum pressure state.

[0098] Automatic pressure relief and reset. When the compression piston 11 moves downward to the lower dead point, the switch rod 13 on the piston touches the switch ring 12, pushing the switch ring 12 downward to open the corresponding oil drain pipe 14. The high-pressure hydraulic oil in the primary compression tank 1 and the secondary compression tank 3 enters the oil tank 9 through the oil drain pipe 14 to release the pressure in the tank. After the pressure is lost, the compression piston 11 is pushed upward by the reset spring 15 of the primary compression tank 1 or the secondary compression tank 3 of the residual pressure of the cooling medium until the switch rod 13 is separated from the switch ring 12. The switch ring 12 is reset to close the oil drain pipe 14 under the action of elasticity, and this reciprocating process is repeated to achieve automatic pressure relief and reset of the compression piston 11.

[0099] Forced heat dissipation, the high-pressure cooling medium enters the evaporating coil in the cooling box 6 through the expansion valve throttling, absorbs the heat of the hydraulic oil and evaporates into a low-pressure gas state, and the evaporated cooling medium returns to the first-stage compression tank 1 through the cooling medium return pipe 16 to complete the cycle. In this process, with the reciprocating motion of the compression piston 11, the permanent magnet on the piston drives the external lifting plate 17 to move synchronously through magnetic force. The lifting plate 17 is like a piston fan, which forces the acceleration of the flow of air around the high-pressure heat dissipation pipe 5, significantly enhances the convection heat exchange between the heat dissipation pipe and the air, and improves the heat dissipation effect of the cooling medium.

[0100] Automatic heat storage. When the hydraulic pump station works continuously, driven by the residual pressure, the cooling medium circulates continuously in the system and dissipates heat. The cold energy after heat dissipation is continuously stored in the cold storage layer 7 of the cooling box 6. The cold storage layer 7 acts as a cold energy storage battery. When the load fluctuates, the release of cold energy can be intelligently adjusted to smooth the heat dissipation capacity of the system.

[0101] Automatic cooling: when the temperature of the hydraulic oil in the oil tank 9 rises, the thermally responsive shape memory alloy 10 expands due to the heat and changes its shape, making it in close contact with the inner wall of the cold storage layer 7. The heat of the hydraulic oil is conducted to the cold storage layer 7 through the alloy wire, where it is absorbed by the cold and cooled. When the temperature of the hydraulic oil drops below the set value, the alloy wire resets and contracts, separating from the cold storage layer 7 again, disconnecting the heat transfer path. The adaptive temperature response behavior can accurately control the temperature rise of the hydraulic oil, avoid excessively high or low temperatures, and ensure the normal operation of the system.

[0102] The residual pressure of the hydraulic system is used as the driving force, the utilization efficiency of the cooling medium is improved through two-stage compression, and a number of innovative designs such as automatic pressure relief and reset, forced heat dissipation, and adaptive cold storage are combined to ultimately achieve efficient energy saving and intelligent temperature control of the hydraulic pump station heat dissipation system, which can significantly improve the heat dissipation performance and working reliability of hydraulic equipment.

[0103] The residual pressure of the hydraulic system itself is used to drive the cooling medium compression cycle, without the need for additional power input, which can significantly reduce the energy consumption of the cooling system. At the same time, the residual pressure drive method also makes the compression process more continuous and stable, thereby improving the efficiency of the cooling cycle.

[0104] The two-stage compression design using the first-stage compression tank 1 and the second-stage compression tank 3 can enable the cooling medium to obtain a higher compression ratio and a lower temperature, increase the heat exchange temperature difference in the high-pressure heat dissipation pipe 5, and enhance the heat dissipation effect. Compared with single-stage compression, the thermal performance is better.

[0105] The compression piston 11 is provided with a switch rod 13 and a switch ring 12, which can realize the automatic opening and closing of the pressure relief valve. With the action of the reset spring 15, the entire pressure relief reset process does not require manual operation and control, thereby improving the automation and reliability of the system.

[0106] By utilizing the permanent magnet on the compression piston 11 and the external lifting plate 17, the reciprocating motion of the piston is converted into the synchronous motion of the lifting plate 17, thereby forcibly accelerating the flow of air around the heat dissipation pipe, realizing active turbulence in the heat dissipation space and significantly improving the heat transfer coefficient.

[0107] The cold storage layer 7 is provided as a cold storage and regulating device, which stores more cold energy when the load is low and releases cold energy when the load is high. It is like a cold energy regulator, which can effectively cope with the fluctuation of the heat dissipation load and make the cooling capacity of the system more stable and continuous.

[0108] A thermally responsive shape memory alloy 10 is arranged between the oil tank 9 and the cold storage layer 7, which automatically changes its shape according to the oil temperature state, thereby realizing adaptive switching of the heat path between the oil tank 9 and the cold storage layer 7, avoiding the lag of manual temperature control, and making the oil temperature control more timely and accurate.

[0109] The entire cooling system has a compact structure, with highly integrated functions such as compression, heat exchange, cold storage, and temperature control. It is small in size and easy to install on equipment such as hydraulic pump stations.

[0110] This heat dissipation solution does not rely on specific working conditions and has strong adaptability to factors such as ambient temperature, hydraulic oil temperature, and load changes. Under harsh operating conditions such as high temperature, heavy load, and variable working conditions, the system's heat dissipation effect and operating stability are still excellent, and it has broad prospects for promotion and application.

[0111] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A heat dissipation structure of a hydraulic pump station, characterized in that: The invention comprises a first-stage compression tank (1), wherein a connecting pipe (2) is fixedly connected to the bottom of the first-stage compression tank (1), and an end of the connecting pipe (2) away from the first-stage compression tank (1) is fixedly connected to a second-stage compression tank (3), and an oil inlet pipe (4) is fixedly connected to the top of the first-stage compression tank (1) and the second-stage compression tank (3), and the oil inlet pipe (4) is connected to a hydraulic pump station, and a high-pressure heat dissipation pipe (5) is fixedly connected to the bottom of the second-stage compression tank (3), and an expansion valve is fixedly connected to the end of the high-pressure heat dissipation pipe (5) away from the second-stage compression tank (3), and a cooling box (6) is fixedly connected to the cooling box (6), and a heat storage layer (7) is fixedly connected to the inner wall of the heat storage layer (7), and an oil tank (9) is fixedly connected to the heat insulation layer (8), and a plurality of thermally responsive shape memory alloys (10) are fixedly connected between the heat insulation layer (8) and the oil tank (9), and the high-pressure heat dissipation pipe (5) is filled with a cooling medium; The first-stage compression tank (1) and the second-stage compression tank (3) are both slidably connected with compression pistons (11), and the upper sides of the compression pistons (11) are each provided with a switch ring (12), and the outer ends of the plurality of switch rings (12) are respectively slidably connected with the inner walls of the first-stage compression tank (1) and the second-stage compression tank (3); The bottom ends of the plurality of switch rings (12) are all fixedly connected to switch rods (13); the ends of the plurality of switch rods (13) away from the switch rings (12) all penetrate the compression piston (11), and the penetrated portions are all provided with bosses; The outer ends of the first-stage compression tank (1) and the second-stage compression tank (3) are fixedly connected to the positions corresponding to the switch ring (12) with oil drain pipes (14); a plurality of the oil drain pipes (14) are connected to each other at one end away from the first-stage compression tank (1) and the second-stage compression tank (3), and the interconnected parts are fixedly connected to the top of the oil tank (9); A return spring (15) is fixedly connected between the bottom end of the compression piston (11) in the first-stage compression tank (1) and the bottom end of the first-stage compression tank (1), and the return spring (15) is in a free state after installation; A cooling medium return pipe (16) is fixedly connected to the bottom end of the first-stage compression tank (1), and an end of the cooling medium return pipe (16) away from the first-stage compression tank (1) is fixedly connected to the bottom end of the cooling box (6), and a one-way valve is fixedly connected to the connecting pipe (2), the high-pressure heat dissipation pipe (5) and the cooling medium return pipe (16).

2. The heat dissipation structure of a hydraulic pump station according to claim 1, characterized in that: Sealing rings are fixedly connected between the plurality of compression pistons (11) and the first-stage compression tank (1) and the second-stage compression tank (3), and between the plurality of switch rings (12).

3. The heat dissipation structure of a hydraulic pump station according to claim 1, characterized in that: A plurality of permanent magnets are fixedly connected to the compression pistons (11); a lifting plate (17) is slidably connected to the outer ends of the first-stage compression tank (1) and the second-stage compression tank (3) at positions corresponding to the compression piston (11); and a plurality of permanent magnets are also fixedly connected to one end of the plurality of lifting plates (17) close to the compression piston (11); and the permanent magnets on the lifting plates (17) and the permanent magnets on the compression piston (11) are arranged to attract each other.

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