Oil temperature regulating heat exchanger device

Abstract

The utility model provides a kind of oil temperature regulating heat exchanger device, it is related to heat exchanger technical field, including oil circuit system and circulating oil pump;The oil circuit system includes oil tank, filter branch and cooler branch;Filter branch includes external filter and the first bypass parallel with the external filter;Cooler branch includes cooling unit and the second bypass parallel with the cooling unit;First check valve is provided on the first bypass, and second check valve is provided on the second bypass;The first check valve and second check valve are opened to conduct when oil circuit pressure exceeds preset opening pressure.This utility model can automatically open to form bypass when oil temperature is too low, viscosity surges and cause system pressure to be abnormally high, so that high-pressure oil flow is relieved, not only protects filter element and cooler core, avoids being high-pressure breakdown, but also effectively prevents the motor of circulating oil pump from burning due to overload, structure is ingenious, help to improve product service life.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology, and in particular to an oil temperature regulating heat exchanger device. Background Technology

[0002] In mechanical equipment, especially heavy equipment such as large machine tools, stamping equipment, and heavy-duty gearboxes, high-viscosity, heavy-duty lubricating oils are crucial for ensuring normal operation. These lubricating oils typically require precise temperature control within a narrow range of 40-45°C. This is because if the oil temperature falls below this range, the viscosity increases exponentially, and fluidity deteriorates drastically. This not only increases friction and local resistance in pipeline transport but also easily causes the motor driving the oil pump to overheat, trip, or even burn out due to overload. Simultaneously, excessively high system pressure can easily crush the filter element structure in precision filters or cause irreversible damage to weak welds and seals in plate and tube-fin coolers. Conversely, if the oil temperature remains above this range for an extended period, the viscosity of the oil will decrease excessively, resulting in insufficient oil film strength, reduced lubrication efficiency, and significantly accelerated thermal oxidation, generating harmful substances such as gum and carbon deposits. This shortens the service life of the oil and critical components, ultimately threatening the reliability and economy of the entire equipment system.

[0003] Currently, common oil temperature control devices typically include basic units such as heaters, coolers, oil pumps, and filters. However, existing technologies have certain technical shortcomings: First, when the equipment starts up or the ambient temperature is low, high-viscosity oil has poor fluidity, generating significant resistance and high pressure as it flows through the filter and cooler. This high pressure can easily damage the filter element and cooler core, and cause the oil pump motor to overload. Existing solutions mostly rely on system pressure resistance or simple pressure relief valves, which cannot ensure that the oil circuit quickly enters the normal operating cycle while protecting critical components. Second, the oil pump usually operates at a constant speed, providing a fixed flow rate. However, when the oil temperature is low and the viscosity is high, the required system flow rate could be reduced, but operating at a constant flow rate not only wastes electrical energy but may also hinder sufficient heat exchange of the oil in the heat exchanger due to excessively high flow rates.

[0004] In other words, existing technologies still have technical shortcomings, and there is an urgent need for an oil temperature regulating heat exchanger device that can address the characteristics of high-viscosity, heavy-load oils to solve the above problems. Utility Model Content

[0005] This invention overcomes the shortcomings of the prior art and provides an oil temperature regulating heat exchanger device, which has the functions of high safety and improved product service life.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: An oil temperature regulating heat exchanger device includes an oil circuit system and a circulating oil pump; the oil circuit system includes an oil tank, a filter branch, and a cooler branch, wherein the oil tank is connected to the filter branch, the filter branch is connected to the cooler branch, and the cooler branch is connected to the oil tank; The filter branch includes an external filter and a first bypass connected in parallel with the external filter; the cooler branch includes a cooling unit and a second bypass connected in parallel with the cooling unit; a first check valve is provided on the first bypass and a second check valve is provided on the second bypass; the first check valve and the second check valve are opened to conduct when the oil pressure exceeds the preset opening pressure. The cooling unit includes a cooler and an EC fan that provides forced air cooling to the cooler. The EC fan is a continuously variable speed fan. The circulating oil pump is driven by a variable frequency motor.

[0007] Furthermore, it also includes a built-in filter disposed within the oil tank, the built-in filter being connected in the inlet direction of the circulating oil pump.

[0008] Furthermore, the top of the fuel tank is provided with a filler port, and the bottom is provided with a drain port; the fuel tank is also provided with a system inlet and a system return port. The oil tank is equipped with a heating rod, an oil dipstick, and a temperature sensor.

[0009] Furthermore, the opening pressure of the first check valve and the second check valve is set to 3 to 7 bar.

[0010] Furthermore, a pressure gauge is installed on the oil outlet line of the circulating oil pump to monitor the system pressure.

[0011] Furthermore, the heating rod is an electric heating rod, used to preheat the oil in the oil tank when the oil temperature is lower than the starting temperature; The cooler is an air-cooled plate-fin cooler or a tube-and-fin cooler, and the EC fan is positioned directly opposite the heat sink of the cooler.

[0012] Furthermore, the temperature sensor is electrically connected to the EC fan and the circulating oil pump.

[0013] Furthermore, it also includes an alarm unit, which is electrically connected to the temperature sensor. When the oil temperature detected by the temperature sensor continuously exceeds the upper safety limit or falls below the lower safety limit, the alarm unit is triggered to sound an alarm.

[0014] Furthermore, from a top-down view, the filter branch, cooler branch, first bypass, and second bypass are all located within the projected area of ​​the oil tank.

[0015] Compared with the prior art, the beneficial effects of this utility model are: This invention features one-way valves with specific opening pressures installed on the filter and cooler branches. When the oil temperature is too low or the viscosity surges, causing an abnormal increase in system pressure, the one-way valves automatically open to form a bypass, allowing the high-pressure oil flow to release pressure. This not only protects the filter element and cooler core from being punctured by high pressure, but also effectively prevents the circulating oil pump motor from burning out due to overload. The ingenious structure helps to improve the product's service life. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and, together with the embodiments of the present invention, are used to explain the present invention. They do not constitute a limitation thereof. In the drawings: Figure 1 It is a three-dimensional oil temperature regulating heat exchanger device Figure 1 ; Figure 2 This is a front view of the oil temperature regulating heat exchanger device; Figure 3 It is a three-dimensional oil temperature regulating heat exchanger device Figure 2 ; Figure 4 This is a side view of the oil temperature regulating heat exchanger unit; Figure 5 This is a top view of the oil temperature regulating heat exchanger device.

[0017] In the diagram: 0. Oil tank; 1. Circulating oil pump; 2. External filter; 3. First bypass; 4. Second bypass; 5. First check valve; 6. Second check valve; 7. Cooler; 8. EC fan; 10. Filler port; 11. Drain port; 12. System oil inlet; 13. System oil return port; 14. Heating rod; 15. Pressure gauge. Detailed Implementation

[0018] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0019] like Figures 1 to 5 As shown, this utility model claims protection for an oil temperature regulating heat exchanger device, including an oil circuit system and a circulating oil pump 1 that provides power to the entire system. The oil circuit system forms a closed loop, including an oil tank 0, a filter branch, and a cooler branch. The oil circulation path is as follows: the oil in the oil tank 0 is pumped out by the circulating oil pump 1, first flows through the filter branch, is filtered and purified, flows into the cooler branch, and finally, the temperature-regulated oil flows back to the oil tank 0, completing one working cycle.

[0020] The filter branch includes an external filter 2 and a first bypass 3 connected in parallel with the external filter 2. A first check valve 5 is installed on the first bypass 3. At normal operating oil temperature, the oil flows through the external filter 2 for filtration. When the system starts up or the ambient temperature is extremely low, causing the oil viscosity to be too high and the resistance to flow through the filter to be extremely high, the oil pressure will rise rapidly. Once the pressure exceeds the preset opening pressure of the first check valve 5, the first check valve 5 is opened, allowing some oil to bypass directly through the first bypass 3, thereby effectively protecting the filter element of the external filter 2 from being punctured by high pressure, and at the same time preventing the motor of the circulating oil pump from being damaged by overload. After the oil temperature rises, the oil fluidity improves, and the system pressure drops, the first check valve 5 automatically closes under the action of spring force, and the oil resumes to flow through the external filter 2 for normal filtration. The working principle of the check valve is existing technology and will not be described in detail here.

[0021] Similarly, the cooler branch includes a cooling unit and a second bypass 4 connected in parallel with the cooling unit. A second one-way valve 6 is installed on the second bypass 4. The cooling unit specifically consists of a cooler 7 and an EC fan 8 that provides forced air cooling. The EC fan 8 is a continuously variable fan, and its speed can be continuously adjusted by an input signal. The working principle of the second one-way valve 6 is the same as that of the first one-way valve 5. It is mainly used to provide bypass protection when the oil temperature is extremely low and the internal flow resistance of the cooler is too high, preventing damage to the core of the cooler 7. When the oil temperature is normal or high and cooling is required, the system pressure is insufficient to open the second one-way valve 6, and the oil will flow through the cooler 7 for heat exchange.

[0022] The circulating oil pump 1 is driven by a variable frequency motor, and the speed of the oil pump can be steplessly adjusted according to the actual working conditions, so as to achieve energy saving and optimized heat exchange.

[0023] Specifically, the top of the oil tank 0 is equipped with a filler port 10 for adding new oil, and the bottom of the oil tank 0 is equipped with a drain port 11 for completely draining old oil during maintenance. The side wall or end of the oil tank 0 is equipped with a system oil inlet 12 and a system oil return port 13, which are used to connect to external equipment to be lubricated and to receive oil returning from the equipment, respectively, so that this device can be connected to a larger lubrication system.

[0024] To perform preliminary filtration of the oil before it enters the circulating pump and to protect the pump, a built-in filter is installed inside the oil tank 0, in front of the suction inlet of the circulating oil pump 1. This filter primarily filters larger particles of impurities. A heating rod 14 is also installed inside the oil tank 0; in this embodiment, the heating rod 14 is an electric heating rod. When the equipment is shut down for an extended period or the ambient temperature is too low, the heating rod 14 can preheat the oil in the oil tank 0, reducing its initial viscosity and improving startup conditions. Simultaneously, the oil tank 0 is equipped with an oil dipstick for manual oil level checks and a temperature sensor for real-time oil temperature monitoring, providing key parameters for system control and maintenance.

[0025] In this embodiment, the opening pressure of the first check valve 5 and the second check valve 6 is set to 3 to 7 bar, for example, 5 bar. Practical verification has shown that this range can effectively identify abnormally high pressure caused by low temperature and high viscosity and activate protection, while avoiding malfunctions under fluctuating pressure during normal system operation, thus balancing protection sensitivity and system operational stability.

[0026] A pressure gauge 15 is installed on the outlet line of the circulating oil pump 1 to monitor the pressure of the main oil circuit of the system in real time and visually. Operators and maintenance personnel can determine whether the system is in normal condition by reading the pressure gauge 15.

[0027] Cooler 7 can be an air-cooled plate-fin cooler or a tube-and-fin cooler, both of which are characterized by their compactness and high heat exchange efficiency. EC fan 8 is positioned directly opposite the heat sink of cooler 7 to form the most effective forced convection airflow and maximize heat dissipation.

[0028] The signal output terminal of the temperature sensor can be connected to the input terminal of the control system, and the output terminal of the control system is electrically connected to the speed control driver of EC fan 8 and the variable frequency motor driver of circulating oil pump 1, respectively. Based on the real-time monitored oil temperature signal, the control system executes predetermined control logic to adjust the speed of EC fan 8 and circulating oil pump 1. For example, control can be performed in the following manner: During low-temperature phases, such as when the oil temperature T < 40℃, the control system determines that active cooling is unnecessary and controls EC fan 8 to maintain its minimum speed or stop, in order to save energy. At the same time, the circulating oil pump 1 is controlled to operate at a lower speed to provide the small flow rate required to maintain basic circulation, which avoids the high load caused by high flow rate at high viscosity and also creates conditions for the oil to slowly heat up through the heating rod area.

[0029] During the temperature rise phase, if 40℃ ≤ T < 43℃, the oil temperature enters the lower limit of the target range but still does not exceed the standard. The control system maintains the low speed of EC fan 8 and gradually increases the speed of circulating oil pump 1 to increase the system flow, promote uniform oil temperature in oil tank 0 and accelerate the heat exchange process.

[0030] During the high-temperature cooling phase, such as when T ≥ 43℃, the oil temperature reaches or exceeds the set target upper limit. The control system first increases the speed of the circulating oil pump 1 to a higher or rated level to circulate the oil at maximum flow rate. Then, depending on how much the oil temperature exceeds the set value, the control system increases the speed of the EC fan 8 to increase the cooling airflow, thereby quickly and accurately bringing the oil temperature back to the set range.

[0031] In addition, the temperature sensor can also be connected to an alarm unit, such as an audible and visual alarm. The temperature sensor is connected to the aforementioned control system, and the control system is connected to the alarm unit. When the oil temperature detected by the temperature sensor continuously exceeds the upper limit of safety or falls below the lower limit of safety, indicating that the system may malfunction, the control system triggers the alarm unit to issue an alarm, reminding the operator to intervene and ensuring system safety.

[0032] like Figure 5 As shown, from a top-down view of the device, the filter branch containing the external filter 2, the cooler branch containing the cooler 7, and the first bypass 3, the second bypass 4, and their valves—all these major external pipelines and components—are arranged within the horizontal projected area of ​​the oil tank 0. This layout design saves space, making the overall structure very compact, facilitating installation and layout in areas with limited space. It also ensures clear and concise pipeline routing, reduces the risk of external interference, and is both aesthetically pleasing and practical.

[0033] It should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0034] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An oil temperature regulating heat exchanger device, characterized in that, The system includes an oil circuit system and a circulating oil pump (1); the oil circuit system includes an oil tank (0), a filter branch and a cooler (7) branch, the oil tank (0) is connected to the filter branch, the filter branch is connected to the cooler (7) branch and the cooler (7) branch is connected to the oil tank (0); the filter branch includes an external filter (2) and a first bypass (3) connected in parallel with the external filter (2); the cooler (7) branch includes a cooling unit and a second bypass (4) connected in parallel with the cooling unit; a first one-way valve (5) is provided on the first bypass (3) and a second one-way valve (6) is provided on the second bypass (4); the first one-way valve (5) and the second one-way valve (6) are opened to conduct when the oil circuit pressure exceeds the preset opening pressure; the cooling unit includes a cooler (7) and an EC fan (8) that provides forced air cooling for the cooler (7), the EC fan (8) is a stepless speed regulating fan; the circulating oil pump (1) is driven by a variable frequency motor.

2. The oil temperature regulating heat exchanger device according to claim 1, characterized in that, It also includes a built-in filter disposed in the oil tank (0), the built-in filter being connected in the inlet direction of the circulating oil pump (1).

3. The oil temperature regulating heat exchanger device according to claim 1, characterized in that, The oil tank (0) is provided with an oil filling port (10) at the top and an oil drain port (11) near the bottom; the oil tank (0) is also provided with a system oil inlet (12) and a system oil return port (13); the oil tank (0) is provided with a heating rod (14) inside, and is also provided with an oil dipstick and a temperature sensor.

4. The oil temperature regulating heat exchanger device according to claim 1, characterized in that, The opening pressure of the first check valve (5) and the second check valve (6) is set to 3 to 7 bar.

5. The oil temperature regulating heat exchanger device according to claim 1, characterized in that, A pressure gauge (15) is installed on the oil outlet line of the circulating oil pump (1) to monitor the system pressure.

6. The oil temperature regulating heat exchanger device according to claim 3, characterized in that, The heating rod (14) is an electric heating rod (14) used to preheat the oil in the oil tank (0) when the oil temperature is lower than the starting temperature; The cooler (7) is an air-cooled plate-fin cooler (7) or a tube-fin cooler (7), and the EC fan (8) is positioned directly opposite the heat sink of the cooler (7).

7. The oil temperature regulating heat exchanger device according to claim 3, characterized in that, The temperature sensor is electrically connected to the EC fan (8) and the circulating oil pump (1).

8. The oil temperature regulating heat exchanger device according to claim 7, characterized in that, It also includes an alarm unit, which is electrically connected to the temperature sensor. When the oil temperature detected by the temperature sensor continuously exceeds the upper safety limit or falls below the lower safety limit, the alarm unit is triggered to sound an alarm.

9. The oil temperature regulating heat exchanger device according to claim 1, characterized in that, From a top view, the filter branch, the cooler (7) branch, the first bypass (3) and the second bypass (4) are all located within the projected area of ​​the oil tank (0).

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