Heat exchange type heat dissipating device for hydro-mechanical transmission system
By using a heat exchange-type hydraulic-mechanical transmission system, combined with an engine, thermostat, radiator, water pump, and heat exchange mechanism, efficient heat dissipation and fault warning of transmission oil are achieved. This solves the problems of unstable heat dissipation and untimely high temperature warning in conventional air-cooled systems, and improves the stability and safety of the system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUBEI SAIFU PRECISION TECH CO LTD
- Filing Date
- 2025-10-11
- Publication Date
- 2026-07-31
AI Technical Summary
In the existing technology, the conventional air-cooled oil cooling system of trackless rubber-tired mining vehicles and construction machinery is easily affected by external factors, resulting in unstable heat dissipation and failure to provide timely warnings of high temperatures leading to aging of sealing elements.
The system employs a heat exchange hydraulic-mechanical transmission system, which combines an engine, thermostat, radiator, water pump, and heat exchange mechanism to achieve dual-circulation heat exchange between transmission oil and coolant. Combined with constant temperature adaptation, it enables efficient heat dissipation and fault warning.
It achieves efficient heat dissipation and temperature monitoring of transmission oil, solves the problems of unstable heat dissipation and untimely high temperature warning, and improves the stability and safety of the system.
Smart Images
Figure CN224576475U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heat dissipation devices for heat exchange type hydraulic mechanical transmission systems. Background Technology
[0002] Currently, conventional air-cooled oil coolers are commonly used in the fields of trackless rubber-tired vehicles for mining and construction machinery. These systems use conventional air-cooled transmission oil cooling systems, which are low in cost but highly susceptible to external factors. Under external interference, the heat dissipation effect is prone to instability. At the same time, when the heat dissipation effect fluctuates due to external interference, high temperatures are not easily detected and the vehicle is not stopped in time, which can easily cause the sealing components of the heat dissipation system to fail and age due to high temperatures.
[0003] Chinese utility model patent CN219345149U discloses a mechanical transmission cooling mechanism, including a first drive wheel, a transition wheel mechanism, a fan wheel mechanism, and a first hydraulic oil cooler. The first drive wheel is connected to the transition wheel mechanism and the fan wheel mechanism in sequence via a belt. A first cooling fan is provided on the fan wheel mechanism, and the first hydraulic oil cooler is located in front of the first cooling fan.
[0004] The aforementioned technologies have the following drawbacks: using a fan mechanism to cool the transmission oil not only has limited cooling effect, but also fails to detect when the transmission oil temperature is too high in time, leading to aging of the sealing elements in the transmission system and malfunctions such as oil leakage. Utility Model Content
[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a heat dissipation device for a heat exchange type hydraulic mechanical transmission system, which solves the technical problems of limited heat dissipation effect and untimely early warning in the prior art.
[0006] To achieve the above technical objectives, the present invention provides a heat exchange type hydraulic mechanical transmission system heat dissipation device, including a starting mechanism, wherein the starting mechanism includes an engine, a thermostat, a radiator and a water pump, the outlet of the engine is connected to the inlet of the thermostat, the first outlet of the thermostat is connected to the inlet of the radiator, the outlet of the radiator is connected to the first inlet of the water pump, and the outlet of the water pump is connected to the inlet of the engine. The transmission mechanism includes an oil outlet pipe and an oil inlet pipe; and, The heat exchange mechanism has an outlet pipe that is connected to a first inlet of the heat exchange mechanism, a first outlet of the heat exchange mechanism that is connected to an inlet pipe, an outlet of the radiator that is connected to a second inlet of the heat exchange mechanism, and a second outlet of the heat exchange mechanism that is connected to an inlet of the water pump. The heat exchange mechanism is used to enable heat exchange between the transmission oil and the coolant.
[0007] In some embodiments, the heat exchange mechanism includes a heat exchange shell, a heat exchange oil pipe, and a heat exchange water pipe. The heat exchange oil pipe and the heat exchange water pipe are both disposed inside the heat exchange shell. The outlet of the radiator is connected to the first inlet of the heat exchange water pipe. The outlet of the heat exchange water pipe is connected to the inlet of the water pump. The outlet of the oil outlet pipe is connected to the inlet of the heat exchange oil pipe. The outlet of the heat exchange oil pipe is connected to the inlet of the oil inlet pipe.
[0008] In some embodiments, the starting mechanism further includes a bypass pipe, the second outlet of the thermostat is connected to the inlet of the bypass pipe, the first outlet of the bypass pipe is connected to the second inlet of the hot water exchange pipe, and the second outlet of the bypass pipe is connected to the second inlet of the water pump.
[0009] In some embodiments, the inlet of the heat exchange oil pipe and the outlet of the heat exchange water pipe are located on the same side, and the outlet of the heat exchange oil pipe and the inlet of the heat exchange water pipe are located on the same side.
[0010] In some embodiments, both the heat exchange oil pipe and the heat exchange water pipe are spiral-shaped.
[0011] In some embodiments, the heat exchange mechanism further includes turbulence columns, which are respectively spaced apart in the heat exchange oil pipe and the heat exchange water pipe along the length direction of the heat exchange oil pipe and the heat exchange water pipe.
[0012] In some embodiments, the heat exchange mechanism further includes a heat-conducting plate, one end of which is connected to the heat exchange oil pipe and the other end of which is connected to the heat exchange water pipe.
[0013] In some embodiments, the heat exchange mechanism further includes an anti-sticking layer connected to the inside of the heat exchange oil pipe.
[0014] In some embodiments, the heat exchange mechanism further includes a damping ring, which is connected between the heat exchange oil pipe and the heat exchange shell, and between the heat exchange water pipe and the heat exchange shell.
[0015] In some embodiments, the heat exchange mechanism further includes an insulation layer connected to the inner side of the heat exchange shell.
[0016] Compared with the prior art, the beneficial effects of this utility model include: by using dual-cycle heat exchange and constant temperature adaptation, it solves the problems of limited heat dissipation effect and lack of temperature monitoring of traditional fans, and realizes the dual functions of efficient heat dissipation and fault early warning of transmission oil. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of the heat dissipation device provided by this utility model; Figure 2 This is a schematic diagram of the overall structure of the heat exchange mechanism provided by this utility model.
[0018] Explanation of reference numerals in the attached figures: 1. Starting mechanism; 11. Engine; 12. Thermostat; 13. Radiator; 14. Water pump; 15. Bypass pipe; 2. Transmission mechanism; 21. Oil outlet pipe; 22. Oil inlet pipe; 3. Heat exchange mechanism; 31. Heat exchange shell; 32. Heat exchange oil pipe; 33. Heat exchange hot water pipe; 34. Baffle column; 35. Heat conduction plate; 36. Shock absorber ring. Detailed Implementation
[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.
[0020] This utility model provides a heat dissipation device for a heat exchange type hydraulic mechanical transmission system, the structure of which is as follows: Figure 1 - Figure 2 As shown, it includes an engine 11, a transmission mechanism 2, and a heat exchange mechanism 3.
[0021] The engine 11 assembly includes an engine 11, a thermostat 12, a radiator 13, and a water pump 14. The outlet of the engine 11 is connected to the inlet of the thermostat 12. The first outlet of the thermostat 12 is connected to the inlet of the radiator 13. The outlet of the radiator 13 is connected to the first inlet of the water pump 14. The outlet of the water pump 14 is connected to the inlet of the engine 11.
[0022] The transmission mechanism 2 includes an oil outlet pipe 21 and an oil inlet pipe 22.
[0023] The outlet of the oil outlet pipe 21 is connected to the first inlet of the heat exchange mechanism 3, the first outlet of the heat exchange mechanism 3 is connected to the inlet of the oil inlet pipe 22, the outlet of the radiator 13 is connected to the second inlet of the heat exchange mechanism 3, and the second outlet of the heat exchange mechanism 3 is connected to the inlet of the water pump 14. The heat exchange mechanism 3 is used to enable heat exchange between the transmission oil and the coolant.
[0024] During operation, the high-temperature coolant generated by the engine 11 is discharged from the outlet and enters the thermostat 12 for temperature judgment. If the temperature is below the threshold, the thermostat 12 closes the first outlet, and the coolant flows directly back to the water pump 14. If the temperature is above the threshold, the first outlet opens, and the coolant is delivered in two paths: one path enters the radiator 13, and the other path directly enters the second inlet of the heat exchange mechanism 3. Finally, the coolant cooled by the radiator 13 merges with the coolant flowing out of the heat exchange mechanism 3, is pressurized by the water pump 14, and flows back to the engine 11, completing the cooling of the engine 11. When the hydraulic-mechanical transmission system is working, the transmission oil heats up due to friction. The high-temperature transmission oil enters the first inlet of the heat exchange mechanism 3 through the oil outlet pipe 21, and after heat exchange with the low-temperature coolant from the radiator 13 in the heat exchange mechanism 3, the cooled transmission oil flows back to the transmission system through the oil inlet pipe 22, realizing the heat dissipation cycle.
[0025] In this invention, the dual-cycle heat exchange and constant temperature adaptation solve the problems of limited heat dissipation effect and lack of temperature monitoring of traditional fans, and realize the dual functions of efficient heat dissipation and fault early warning of transmission oil.
[0026] To achieve heat exchange between the transmission oil and coolant, please refer to... Figure 2 In a preferred embodiment, the heat exchange mechanism 3 includes a heat exchange shell 31, a heat exchange oil pipe 32, and a heat exchange hot water pipe 33. The heat exchange oil pipe 32 and the heat exchange hot water pipe 33 are both disposed inside the heat exchange shell 31. The outlet of the radiator 13 is connected to the first inlet of the heat exchange hot water pipe 33. The outlet of the heat exchange hot water pipe 33 is connected to the inlet of the water pump 14. The outlet of the oil outlet pipe 21 is connected to the inlet of the heat exchange oil pipe 32. The outlet of the heat exchange oil pipe 32 is connected to the inlet of the oil inlet pipe 22.
[0027] In operation, the heat exchange oil pipe 32 serves as the flow channel for transmission oil. Its inlet is connected to the oil outlet pipe 21 of the transmission mechanism 2 via a flange, and its outlet is connected to the oil inlet pipe 22 via a flange, forming a closed loop of transmission oil, oil outlet pipe 21, heat exchange oil pipe 32, oil inlet pipe 22, and transmission system. The heat exchange water pipe 33 serves as the flow channel for coolant. Its first inlet is connected to the outlet of the radiator 13, and its outlet is connected to the inlet of the water pump 14, connecting to a branch of the cooling cycle of the engine 11, forming a branch loop of radiator 13, heat exchange water pipe 33, water pump 14, and engine 11. The high-temperature transmission oil generated during the operation of the transmission system enters the heat exchange oil pipe 32 through the oil outlet pipe 21 and flows along the inside of the pipe. At the same time, the low-temperature coolant in the engine 11 cooling system, cooled by the radiator 13, enters the heat exchange water pipe 33 through its first inlet and flows in the opposite direction to the transmission oil. Because the walls of the heat exchange oil pipe 32 and the heat exchange water pipe 33 are in direct contact or separated only by a thin layer of air, a highly efficient heat transfer path is formed. The heat of the high-temperature transmission oil is conducted through the wall of the heat exchange oil pipe 32 to the wall of the heat exchange water pipe 33. The low-temperature coolant in the heat exchange water pipe 33 absorbs heat and its temperature rises, while the transmission oil in the heat exchange oil pipe 32 releases heat and its temperature decreases. The cooled transmission oil flows back to the transmission system from the outlet of the heat exchange oil pipe 32 through the inlet pipe 22 to maintain its normal operating temperature. The coolant that has absorbed heat flows out from the outlet of the heat exchange water pipe 33 and merges with the main cooling loop of the engine 11. It is then pumped back into the engine 11 by the water pump 14 and finally dissipates the absorbed heat to the outside through the radiator 13.
[0028] To avoid overcooling of the coolant, please refer to... Figure 1 In a preferred embodiment, the engine 11 structure 1 further includes a bypass pipe 15, the second outlet of the thermostat 12 is connected to the inlet of the bypass pipe 15, the first outlet of the bypass pipe 15 is connected to the second inlet of the hot water exchange pipe 33, and the second outlet of the bypass pipe 15 is connected to the second inlet of the water pump 14.
[0029] When in use, the bypass pipe 15 serves as the regulating branch of the cooling cycle of the engine 11 and is directly connected to the second outlet of the thermostat 12. Its core function is to divert some of the high-temperature coolant to the hot water pipe 33 and the water pump 14 when the engine 11 coolant temperature does not reach the threshold, so as to avoid the low-temperature coolant from overcooling the transmission oil or delaying the engine 11 from heating up.
[0030] To improve the heat exchange efficiency of the heat exchange oil pipe 32 and the heat exchange water pipe 33, please refer to... Figure 2 In a preferred embodiment, the inlet of the heat exchange oil pipe 32 and the outlet of the heat exchange water pipe 33 are located on the same side, and the outlet of the heat exchange oil pipe 32 and the inlet of the heat exchange water pipe 33 are located on the same side.
[0031] During use, the transmission oil flows from the high-temperature end to the low-temperature end, and the coolant flows from the low-temperature end to the high-temperature end. The two maintain a large temperature difference throughout the inlet, middle section, and outlet of the heat exchange mechanism 3. Compared with the co-flow arrangement, the average heat transfer temperature difference of the counter-flow arrangement is increased, and the cooling rate of the transmission oil is increased.
[0032] To further improve the heat exchange efficiency of the heat exchange oil pipe 32 and the heat exchange water pipe 33, please refer to... Figure 2 In a preferred embodiment, both the heat exchange oil pipe 32 and the heat exchange water pipe 33 are spiral-shaped.
[0033] During use, the flow path of the transmission oil and coolant in the spiral tube is extended, the residence time is extended, and the heat exchange is more complete.
[0034] To further improve the heat exchange efficiency of the heat exchange oil pipe 32 and the heat exchange water pipe 33, please refer to... Figure 2 In a preferred embodiment, the heat exchange mechanism 3 further includes a turbulence column 34, which is disposed at intervals in the heat exchange oil pipe 32 and the heat exchange water pipe 33 along the length direction of the heat exchange oil pipe 32 and the heat exchange water pipe 33, respectively.
[0035] During operation, although the helical tube can generate a rotating secondary flow through centrifugal force, a weak turbulent region still exists in the central area of the tube. The turbulence-inducing columns 34 are arranged at intervals along the length of the tube, which forces the fluid to undergo impact, separation, and backflow effects as it flows around the columns. After impacting the columns 34, the fluid splits into multiple branches, forming small-scale vortices behind the columns. These vortices superimpose with the rotating flow of the helical tube to form a three-dimensional cross-vortex, ensuring that the fluid throughout the entire cross-section of the tube is in a state of strong turbulence, further improving the heat transfer efficiency.
[0036] To further improve the heat exchange efficiency of the heat exchange oil pipe 32 and the heat exchange water pipe 33, please refer to... Figure 2 In a preferred embodiment, the heat exchange mechanism 3 further includes a heat-conducting plate 35, one end of which is connected to the heat exchange oil pipe 32, and the other end of which is connected to the heat exchange water pipe 33.
[0037] In traditional heat exchange mechanisms 3, there is a tiny gap between the heat exchange oil pipe 32 and the heat exchange water pipe 33. The air or oil film in the gap creates contact thermal resistance, severely hindering heat transfer. The heat-conducting plate 35 is made of high thermal conductivity copper sheet. Heat is directly transferred from the heat exchange oil pipe 32 to the heat exchange water pipe 33 through the heat-conducting plate 35, avoiding the inefficient path of traditional oil pipes, air, and water pipes, and improving the heat transfer rate.
[0038] To reduce the possibility of sludge adhering to the inner wall of heat exchange oil pipe 32, please refer to... Figure 2 In a preferred embodiment, the heat exchange mechanism 3 further includes an anti-sticking layer, which is connected to the inside of the heat exchange oil pipe 32.
[0039] During use, the transmission oil will generate sludge due to high-temperature oxidation, additive failure, or the introduction of metal shavings during long-term circulation. These impurities are prone to depositing on the inner wall of the heat exchange oil pipe 32, forming scale. The anti-sticking layer is made of polytetrafluoroethylene, a low surface energy material, which has low adhesion to sludge and gum, reducing the probability of impurity particles adhering to the pipe wall. Even if they adhere briefly, they are easily washed away by the high-speed oil flow.
[0040] To reduce the possibility of damage to the heat exchange oil pipe 32 and the heat exchange water pipe 33, please refer to... Figure 2 In a preferred embodiment, the heat exchange mechanism 3 further includes a shock-absorbing ring 36, which is connected between the heat exchange oil pipe 32 and the heat exchange shell 31, and between the heat exchange water pipe 33 and the heat exchange shell 31.
[0041] During operation of the hydraulic-mechanical transmission system, the vibrations of the engine 11 and transmission components are transmitted to the heat exchange mechanism 3 through pipelines or mounting brackets, causing high-frequency collisions or friction between the oil pipes, water pipes, and heat exchange shell 31. The shock-absorbing ring 36 is made of highly elastic damping material nitrile rubber, with an internal honeycomb structure to enhance buffering performance. It absorbs vibration energy through elastic deformation, weakening the impact at the source.
[0042] To make heat transfer between the transmission oil and coolant more concentrated and efficient, please refer to... Figure 2 In a preferred embodiment, the heat exchange mechanism 3 further includes a heat insulation layer connected to the inner side of the heat exchange shell 31.
[0043] During use, the insulation layer is made of aluminum silicate cotton, a material with low thermal conductivity. The insulation layer is set inside the heat exchange shell 31 to block the heat loss from the shell to the outside, maintain a stable heat transfer environment inside the shell, reduce ineffective energy loss during the heat exchange process, and ensure that the heat transfer between the transmission oil and the coolant is more concentrated and efficient.
[0044] To better understand this utility model, the following is combined with... Figure 1 - Figure 2The working principle of a heat exchange type hydraulic-mechanical transmission system cooling device according to the present invention is described in detail below: The high-temperature coolant generated by the engine 11 is discharged from the outlet and enters the thermostat 12 for temperature judgment. If the temperature is below the threshold, the thermostat 12 closes the first outlet, and the coolant flows directly back to the water pump 14. If the temperature is above the threshold, the first outlet opens, and the coolant is delivered in two paths: one path enters the radiator 13, and the other path directly enters the second inlet of the heat exchange mechanism 3. Finally, the coolant cooled by the radiator 13 merges with the coolant flowing out of the heat exchange mechanism 3, and is pressurized by the water pump 14 and returned to the engine 11, completing the cooling of the engine 11. When the hydraulic-mechanical transmission system is working, the transmission oil heats up due to friction. The high-temperature transmission oil enters the first inlet of the heat exchange mechanism 3 through the oil outlet pipe 21, and after heat exchange with the low-temperature coolant from the radiator 13 in the heat exchange mechanism 3, the cooled transmission oil flows back to the transmission system through the oil inlet pipe 22, realizing the heat dissipation cycle.
[0045] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.
Claims
1. A heat dissipation device for a heat exchange type hydraulic mechanical transmission system, characterized in that, include: An engine mechanism, comprising an engine, a thermostat, a radiator, and a water pump, wherein the outlet of the engine is connected to the inlet of the thermostat, the first outlet of the thermostat is connected to the inlet of the radiator, the outlet of the radiator is connected to the first inlet of the water pump, and the outlet of the water pump is connected to the inlet of the engine. The transmission mechanism includes an oil outlet pipe and an oil inlet pipe; and, The heat exchange mechanism has an outlet pipe that is connected to a first inlet of the heat exchange mechanism, a first outlet of the heat exchange mechanism that is connected to an inlet pipe, an outlet of the radiator that is connected to a second inlet of the heat exchange mechanism, and a second outlet of the heat exchange mechanism that is connected to an inlet of the water pump. The heat exchange mechanism is used to enable heat exchange between the transmission oil and the coolant.
2. The heat exchanging hydrodynamic mechanical transmission system heat sink of claim 1, wherein, The heat exchange mechanism includes a heat exchange shell, a heat exchange oil pipe, and a heat exchange hot water pipe. Both the heat exchange oil pipe and the heat exchange hot water pipe are located inside the heat exchange shell. The outlet of the radiator is connected to the first inlet of the heat exchange hot water pipe. The outlet of the heat exchange hot water pipe is connected to the inlet of the water pump. The outlet of the oil outlet pipe is connected to the inlet of the heat exchange oil pipe. The outlet of the heat exchange oil pipe is connected to the inlet of the oil inlet pipe.
3. The heat exchange hydrodynamic mechanical transmission system heat sink of claim 2, wherein, The starting mechanism also includes a bypass pipe, the second outlet of the thermostat is connected to the inlet of the bypass pipe, the first outlet of the bypass pipe is connected to the second inlet of the hot water exchange pipe, and the second outlet of the bypass pipe is connected to the second inlet of the water pump.
4. The heat exchange hydrodynamic mechanical transmission system heat sink of claim 2, wherein, The inlet of the heat exchange oil pipe and the outlet of the heat exchange water pipe are located on the same side, and the outlet of the heat exchange oil pipe and the inlet of the heat exchange water pipe are located on the same side.
5. The heat exchange hydrodynamic mechanical transmission system heat sink of claim 2, wherein, Both the heat exchange oil pipe and the heat exchange water pipe are spiral-shaped.
6. The heat exchange hydrodynamic mechanical transmission system heat sink of claim 2, wherein, The heat exchange mechanism also includes turbulence columns, which are spaced apart in the heat exchange oil pipe and the heat exchange water pipe along the length of the heat exchange oil pipe and the heat exchange water pipe, respectively.
7. The heat exchange hydrodynamic mechanical transmission system heat sink of claim 2, wherein, The heat exchange mechanism also includes a heat-conducting plate, one end of which is connected to the heat exchange oil pipe and the other end of which is connected to the heat exchange water pipe.
8. The heat exchange hydrodynamic mechanical transmission system heat sink of claim 2, wherein, The heat exchange mechanism also includes an anti-sticking layer, which is connected to the inside of the heat exchange oil pipe.
9. The heat exchange hydrodynamic mechanical transmission system heat sink of claim 2, wherein, The heat exchange mechanism also includes a shock-absorbing ring, which is connected between the heat exchange oil pipe and the heat exchange shell, and between the heat exchange water pipe and the heat exchange shell.
10. The heat exchange hydrodynamic mechanical transmission system heat sink of claim 2, wherein, The heat exchange mechanism also includes an insulation layer, which is connected to the inside of the heat exchange shell.