Lubricating oil temperature control device and method for a fluid coupling, fluid coupling

Abstract

The application relates to a lubricating oil temperature regulating device and method for a hydraulic coupler and the hydraulic coupler. The lubricating oil temperature regulating device comprises a working oil circuit module and a leakage oil collecting module. The working oil circuit module comprises a working mechanism and a pressure regulating mechanism, and the pressure regulating mechanism is arranged on an oil circuit upstream of the working mechanism. The working mechanism has a position to be lubricated; a lubricating module is connected with the position to be lubricated; the leakage oil collecting module comprises a collecting mechanism and an oil temperature detecting mechanism. The collecting mechanism is arranged on the working mechanism and is connected with the oil circuit upstream of the lubricating module. The oil temperature detecting mechanism is arranged on the collecting mechanism and is used for detecting the oil temperature of the leakage oil. The oil temperature detecting mechanism is in communication connection with the pressure regulating mechanism. The pressure regulating mechanism adjusts the working oil pressure according to the oil temperature of the leakage oil detected by the oil temperature detecting mechanism. The pressure regulating mechanism can reduce the working oil pressure, reduce the leakage amount of the high-temperature working oil to the outside, and reduce the case that the oil temperature of the lubricating oil is abnormally increased.

Description

Technical Field

[0001] This application relates to the field of lubricating oil temperature control technology, and in particular to a lubricating oil temperature control device and method for use in a hydraulic coupler, and a hydraulic coupler. Background Technology

[0002] All electric main feedwater pump systems in nuclear power units are equipped with hydraulically coupled speed regulating devices. The hydraulic coupling consists of a low-speed rotor, a speed-increasing gear set, a high-speed input rotor, a coupling output rotor, a pump impeller, a turbine, and an auxiliary oil supply system. The speed regulating medium is hydraulic oil. The oil supply system includes three relatively independent oil supply systems: a lubricating oil circuit, a speed regulating oil circuit, and a working oil circuit. These three oil supply systems interact and influence each other.

[0003] Each nuclear power unit is equipped with three water supply systems. According to the water supply requirements, the main feedwater system of the unit's secondary loop issues a unified speed regulation command to the two hydraulic couplers in operation, thereby changing the pump speed and thus regulating the water supply.

[0004] Hydraulic couplings have strict requirements for oil temperature control; otherwise, work loss and equipment damage will occur. From commissioning to normal operation, varying degrees of overheating of the working oil and lubricating oil are common problems. Coolers are installed in both the lubricating oil and working oil circuits, and temperature is generally regulated through these coolers. However, in practical experience, even when the cooler's cooling capacity is fully adequate and there are no abnormalities in the lubricating oil quantity or bearing bearings, overheating of the lubricating oil can still easily occur. Summary of the Invention

[0005] Therefore, it is necessary to provide a lubricating oil temperature regulating device and method for hydraulic couplings, as well as a hydraulic coupling itself, to address the problem of excessively high lubricating oil temperature in hydraulic couplings.

[0006] An embodiment of the first aspect of this application provides a lubricating oil temperature regulating device for a hydraulic coupling, the lubricating oil temperature regulating device for the hydraulic coupling comprising:

[0007] The working oil circuit module includes a working mechanism and a pressure regulating mechanism. The pressure regulating mechanism is located upstream of the oil circuit of the working mechanism and is used to regulate the working oil pressure of the working mechanism. The working mechanism has a lubrication point.

[0008] A lubrication module is connected to the lubrication point of the working mechanism and is used to lubricate the working mechanism.

[0009] A leaking oil collection module includes a collection mechanism and an oil temperature detection mechanism. The collection mechanism is mounted on the working mechanism and is used to collect leaking oil formed by leakage from the working mechanism. The collection mechanism is connected to the upstream oil line of the lubrication module. The oil temperature detection mechanism is mounted on the collection mechanism and is used to detect the temperature of the leaking oil in the collection mechanism. The oil temperature detection mechanism is communicatively connected to the pressure regulating mechanism, and the pressure regulating mechanism adjusts the oil pressure of the working oil according to the leaking oil temperature detected by the oil temperature detection mechanism.

[0010] The aforementioned lubricating oil temperature control device for hydraulic couplings collects leaking oil through a collection mechanism and monitors the oil temperature in real time through an oil temperature detection mechanism. When the oil temperature detection mechanism detects that the leaking oil temperature is equal to or greater than a preset oil temperature, it transmits the leaking oil temperature signal to a pressure regulating mechanism. The pressure regulating mechanism adjusts its own switching amplitude according to the leaking oil temperature detected by the oil temperature detection mechanism, thereby reducing the working oil pressure and decreasing the leakage of high-temperature working oil from the working mechanism. This reduces the abnormal rise in lubricating oil temperature, especially when the cooler's cooling capacity meets requirements and there are no abnormalities in the lubricating oil quantity or bearing bearings. It effectively reduces the rise in lubricating oil temperature and is easy to adjust and use.

[0011] In one embodiment, the lubricating oil temperature control device for the hydraulic coupling includes:

[0012] The oil tank is connected to the downstream oil passage of the working mechanism; the upstream oil passage of the lubrication module is connected to the oil tank, and at least part of the downstream oil passage of the lubrication module flows back into the oil tank.

[0013] The downstream oil passage of the collection mechanism is connected to the oil tank, or the collection mechanism is configured as the oil tank. The oil temperature detection mechanism is used to detect the oil temperature in the oil tank, and the pressure regulating mechanism adjusts the working oil pressure according to the oil temperature detected by the oil temperature detection mechanism.

[0014] In one embodiment, the pressure regulating mechanism includes a pressure relief valve and a preload regulating component. The preload regulating component is connected to the pressure relief valve and is used to adjust the preset starting pressure value of the pressure relief valve. The pressure regulating mechanism is arranged in parallel with the working mechanism.

[0015] When the oil temperature detection mechanism detects that the leaking oil temperature or the oil temperature in the oil tank is equal to or greater than the corresponding preset temperature, the preload adjustment component reduces the preload of the pressure relief valve, and the preset starting pressure value decreases to reduce the working oil pressure.

[0016] In one embodiment, the working oil circuit module includes a working oil pump, the upstream oil path of which is connected to the oil tank, and the downstream oil path of which is connected to the working mechanism, for supplying oil to the internal cavity of the working mechanism.

[0017] In one embodiment, the lubrication module includes:

[0018] The main lubricating oil pump is connected to the oil tank via its upstream oil circuit.

[0019] A lubricating oil cooler is provided downstream of the oil circuit of the main lubricating oil pump.

[0020] The lubrication point of the working mechanism is located downstream of the oil circuit of the lubricating oil cooler, and the lubricating oil output from the lubricating oil cooler is used to lubricate the working mechanism.

[0021] In one embodiment, the lubrication module further includes:

[0022] An auxiliary oil pump, the upstream oil path of which is connected to the oil tank;

[0023] The oil supply line has its upstream oil passage connected to the downstream oil passage of the auxiliary oil pump, and its downstream oil passage connected to the downstream oil passage of the working mechanism. The oil supply line is used to supply oil to the working oil line.

[0024] An embodiment of the second aspect of this application provides a hydraulic coupler, including the above-described lubricating oil temperature regulating device for a hydraulic coupler, wherein the working mechanism is configured as a pump wheel turbine mechanism.

[0025] The aforementioned hydraulic coupler, by incorporating a lubricating oil temperature control device, reduces the leakage of high-temperature working oil from the pump turbine mechanism by lowering the working oil pressure, thereby reducing abnormal increases in lubricating oil temperature. This achieves flexibility in the correlation adjustment of the two characteristic parameters, working oil pressure and lubricating oil temperature, reducing the cooling capacity requirements of the lubricating oil cooler, increasing the redundancy of the lubricating oil cooler, and ensuring that both lubricating oil temperature and working oil temperature are within the required range by adjusting the working oil pressure. This extends the operating time of the hydraulic coupler in high-energy-consuming areas and expands the continuous operating range of the electric main feedwater pump system of nuclear power units under low flow conditions.

[0026] In one embodiment, the hydraulic coupler further includes a speed regulation module connected to the pump turbine mechanism for regulating the output speed of the pump turbine mechanism. The upstream oil circuit of the speed regulation module is connected to the lubrication module, and the downstream oil circuit of the speed regulation module is connected to the oil tank.

[0027] An embodiment of the third aspect of this application provides a method for adjusting the temperature of a lubricating oil, the method comprising:

[0028] Obtain the leakage oil temperature of the working mechanism of the working oil circuit module;

[0029] Compare the leaked oil temperature with the preset oil temperature;

[0030] When the temperature of the leaking oil is equal to or greater than the preset oil temperature, the working oil pressure in the working mechanism of the working oil circuit module is reduced.

[0031] The above-mentioned lubricating oil temperature adjustment method monitors the leaking oil temperature in real time. When the leaking oil temperature is equal to or greater than the preset oil temperature, the working oil pressure is reduced to decrease the leakage amount of the leaking oil. This achieves the flexibility of adjusting the correlation between the two characteristic parameters, working oil pressure and lubricating oil temperature, and is convenient to adjust and use.

[0032] In one embodiment, when the temperature of the leaking oil is lower than the preset oil temperature, the working oil pressure in the working oil circuit module is adjusted to be within the rated oil pressure range. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall oil circuit of the lubricating oil temperature regulating device according to an embodiment of this application.

[0034] Figure 2 This is a schematic diagram of the leakage oil collection module of the lubricating oil temperature regulating device according to an embodiment of this application.

[0035] Figure 3 This is a schematic diagram of the lubrication module of the lubricating oil temperature regulating device according to an embodiment of this application.

[0036] Figure 4 This is a schematic diagram of the working oil circuit module of the lubricating oil temperature regulating device according to an embodiment of this application.

[0037] Figure 5 This is a schematic diagram showing the position of the elastic element within the pressure regulating mechanism of this application embodiment.

[0038] Figure 6 This is a schematic diagram of the leakage oil path within the pump wheel turbine mechanism of the hydraulic coupler according to an embodiment of this application.

[0039] Figure 7 This is a schematic diagram showing the relationship between the rotational speed and power of the hydraulic coupler in an embodiment of this application.

[0040] Figure 8 The data collected is from the lubricating oil of the hydraulic coupling in this embodiment of the application when the temperature alarm is triggered in the high energy consumption zone.

[0041] Figure 9 The lubricating oil temperature test adjustment data for the hydraulic coupling in this embodiment of the application.

[0042] Figure 10 This is a schematic diagram of a lubricating oil temperature control method according to an embodiment of this application.

[0043] In the picture:

[0044] 1. Working oil circuit module; 11. Working mechanism; 111. Pump wheel; 112. Turbine; 113. Housing; 12. Pressure regulating mechanism; 121. Elastic element; 13. Working oil pump; 14. Working oil cooler; 15. First check valve; 16. Second throttle orifice plate; 17. Exhaust pipe;

[0045] 2. Leaking oil collection module; 21. Collection mechanism; 22. Oil temperature detection mechanism;

[0046] 3. Fuel tank;

[0047] 4. Lubrication module; 41. Main lubricating oil pump; 42. Lubricating oil cooler; 43. Auxiliary oil pump; 44. Oil supply pipeline; 45. First throttling orifice plate; 46. Lubrication point; 47. Dual filter;

[0048] 5. Speed ​​regulation module; 51. Regulating valve. Detailed Implementation

[0049] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0050] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0051] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0052] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0053] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0054] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0055] Lubricating oil is prone to high-temperature alarms in high-energy-consumption areas. The inventors made the following attempts:

[0056] 1) Check for bearing failure. Detect the temperature of each bearing bush temperature measuring point and the local return oil temperature of the boost pump, motor, coupler and main pump. If the return oil temperature of each bearing bush is normal, the lubricating oil temperature rise caused by bearing failure can be ruled out.

[0057] 2) Check the oil circuit connections between various components in the lubrication circuit to rule out oil leakage at the connection points of components in the lubrication circuit that could cause the lubrication oil temperature to rise.

[0058] 3) The cooling functions of the working oil and lubricating oil were checked. The cooling water return main of the working oil and lubricating oil has a flow rate of 150 m³ / h, of which the design flow rate is greater than 139 m³ / h, and the cooling water temperature is less than 36.5℃, both of which meet the design requirements. Moreover, judging from the oil temperature at the outlet of the oil cooler, the lubricating oil is 44.7℃ and the working oil is 50.4℃, indicating good cooling effect, thus ruling out the cooling water flow rate and temperature as the cause.

[0059] The above attempts failed to resolve the issue of abnormally high temperature alarms and abnormally high oil temperature in the high-energy-consumption zone of the lubricating oil. Further research by the inventors revealed that, based on the energy loss-speed curve, when the lubricating oil temperature is too high, the hydraulic coupling operates within a range of significant energy loss. The working oil, whose energy loss is converted into heat, entering the oil tank may heat the lubricating oil. Therefore, it was speculated that the amount of working oil entering the oil tank in the high-energy-consumption zone would be excessive. Based on this, the inventors focused their research. System analysis and parameter checks revealed that the cause of the high lubricating oil temperature is: in the high-energy-consumption zone, the working oil temperature is high, reaching 97.3℃. The working oil entering the oil tank in the circulation loop heats the oil temperature inside the tank, thus leading to the excessively high lubricating oil temperature.

[0060] Further analysis of the path from the working oil to the lubricating oil:

[0061] 1) Analyze whether the leakage is caused by a damaged fusible plug: If the fusible plug is intact and there is no leakage, it can be ruled out.

[0062] 2) Analyze whether the leakage in the dynamic exhaust line of the working oil cooler is too large: This exhaust line is connected to the oil tank during the operation of the hydraulic coupler and plays the role of dynamic exhaust of the working oil circuit system to prevent a large amount of hot oil from entering the oil tank. The exhaust line design meets the design requirements. To prevent too much working oil from entering the oil tank through the exhaust line, the exhaust line was partially blocked for a short time, but it had no effect and can be ruled out.

[0063] 3) Analyze whether the problem is working oil backflow into the lubrication system: Disassemble and check the pipeline, and if it is normal, this can be ruled out.

[0064] 4) Analyze whether the leakage is due to high-temperature working oil inside the pump wheel turbine mechanism: After the working chamber is working, the working oil is pressurized at high speed before entering the scoop tube. A small amount of high-temperature working oil enters the oil tank through the structural gap. From the perspective of equipment structure, the pump wheel and turbine rotate at high speed, and there is a large gap between the turbine and the housing. Even through machining and assembly, it is impossible to completely seal the working oil circuit. During the operation of the hydraulic coupling, the high-speed rotation of the pump wheel and turbine pressurizes the working oil. The actual measurement on site shows that the working oil pressure after entering the scoop tube is about 1 bar higher than the oil pressure entering the working chamber, which further promotes the increase of the amount of oil leaking into the oil tank. The temperature of the lubricating oil in the oil tank rises, resulting in an increase in the oil temperature in the lubricating oil circuit.

[0065] Based on the above considerations, in order to solve the problem of excessively high lubricating oil temperature in hydraulic couplings, the inventors, after in-depth research, designed a lubricating oil temperature regulation device and method for hydraulic couplings. The hydraulic coupling is designed with a leakage oil collection module and a pressure regulating mechanism. The collection mechanism collects the leakage oil and the oil temperature detection mechanism detects the leakage oil temperature in real time. The pressure regulating mechanism can reduce the working oil pressure according to the leakage oil temperature detected by the oil temperature detection mechanism, thereby reducing the leakage of high-temperature working oil from the working mechanism and thus reducing the abnormal rise in lubricating oil temperature.

[0066] See Figure 1 An embodiment of this application provides a lubricating oil temperature regulating device for a hydraulic coupling, comprising a working oil circuit module 1 and a leakage oil collection module 2. The working oil circuit module 1 includes a working mechanism 11 and a pressure regulating mechanism 12. The pressure regulating mechanism 12 is located upstream of the oil line of the working mechanism 11 and is used to regulate the working oil pressure of the working mechanism 11. The working mechanism 11 has multiple lubrication points 46, such as rotational connection points between working parts, specifically, such as connection points of bearings or impellers. The lubrication module 4 is connected to the lubrication points 46 of the working mechanism 11 and is used to lubricate the working mechanism 11. The leakage oil collection module 2 includes a collection mechanism 21 and an oil temperature detection mechanism 22. The collection mechanism 21 is located on the working mechanism 11 and is used to collect leakage oil formed by leakage from the working mechanism 11. The collection mechanism 21 is connected upstream of the oil line of the lubrication module 4. The oil temperature detection mechanism 22 is installed on the collection mechanism 21 to detect the oil temperature of the leaking oil in the collection mechanism 21. The oil temperature detection mechanism 22 is connected in communication with the pressure regulating mechanism 12. The pressure regulating mechanism 12 adjusts the working oil pressure according to the oil temperature of the leaking oil in the oil temperature detection mechanism 22.

[0067] With this configuration, the components in the working mechanism 11 require lubrication during high-speed movement. The temperature of the leaking oil flowing out of the working mechanism 11 is much higher than the lubricating oil temperature, causing the lubricating oil temperature to rise. This embodiment addresses this by using a collection mechanism 21 to collect the leaking oil and an oil temperature detection mechanism 22 to monitor its temperature in real time. When the oil temperature detection mechanism 22 detects that the leaking oil temperature is equal to or greater than a preset temperature, it transmits the leaking oil temperature signal to the pressure regulating mechanism 12. The pressure regulating mechanism 12 adjusts its own switching amplitude based on the leaking oil temperature detected by the oil temperature detection mechanism 22, thereby reducing the working oil pressure and decreasing the leakage of high-temperature working oil from the working mechanism 11. This reduces the abnormal rise in lubricating oil temperature, especially when the cooler's cooling capacity meets requirements and the lubricating oil quantity and bearing bearings are normal. This effectively reduces the rise in lubricating oil temperature, is easy to adjust, and solves the problem of abnormal lubricating oil temperature rise in hydraulic couplings.

[0068] The collection mechanism 21 can be, but is not limited to, a tray, a housing, or a conduit. The tray can be installed at the leak location of the working mechanism 11 to collect the leaked oil. The housing can be placed outside the working mechanism 11 to collect the leaked oil. The conduit can be installed at the leak point of the working mechanism 11 to collect and discharge the leaked oil. The oil temperature detection mechanism 22 can include a temperature sensor and a controller that are communicatively connected. The temperature sensor can accurately detect the oil temperature of the leaked oil in the collection mechanism 21 and obtain the oil temperature. The controller can have an input device, which can be, but is not limited to, a keyboard or a touch screen, to input a preset oil temperature. The oil temperature detection mechanism 22 is communicatively connected to the pressure regulating mechanism 12, and the connection method can be, but is not limited to, wired or wireless communication. After comparing the leaked oil temperature with the preset oil temperature, the controller can send a start signal to the pressure regulating mechanism 12 to perform pressure regulation. The preset oil temperature is selected and set based on the influence of the leaked oil on the lubricating oil temperature. When the leaked oil reaches the preset oil temperature, it will cause the lubricating oil temperature to exceed the design standard, causing an over-temperature alarm.

[0069] See Figures 1-2In some embodiments, the lubricating oil temperature control device for the hydraulic coupler includes an oil tank 3 and a lubrication module 4. The downstream oil path of the working mechanism 11 is connected to the oil tank 3, meaning that the working oil in the working mechanism 11 will eventually flow back into the oil tank 3 after the work is completed. The downstream oil path of the collection mechanism 21 is connected to the oil tank 3, meaning that the collection mechanism 21 can be set up independently of the oil tank 3 to directly detect leaked oil. This allows for more accurate determination of the leaked oil temperature, reduces the time delay of indirect detection after the leaked oil is mixed with other return oil, and reduces detection errors caused by uneven mixing of oil. Both the working oil in the working mechanism 11 and the leaked oil in the collection mechanism 21 will collect in the oil tank 3. The upstream oil path of the lubrication module 4 is connected to the oil tank 3, meaning that the lubricating oil in the lubrication module 4 originates from the oil in the oil tank 3. At least a portion of the downstream oil circuit of lubrication module 4 flows back into oil tank 3, meaning the downstream oil circuit of lubrication module 4 can be connected to oil tank 3. The lubricating oil from lubrication of the working mechanism 11's lubrication points 46 by lubrication module 4 will also collect in oil tank 3. Alternatively, the downstream oil circuit of lubrication module 4 can also form an open circuit after lubrication of some lubrication points 46, preventing backflow into oil tank 3. Of course, the amount of lubricating oil lost is far less than the amount that flows back, ensuring that oil tank 3 provides sufficient power to the working oil circuit module 1 and lubrication module 4 for normal operation. With this configuration, the working oil circuit module 1, leakage oil collection module 2, and lubrication module 4 all share the same oil tank 3. Working oil, leakage oil, and lubricating oil all collect in oil tank 3, reducing hydraulic oil loss, making the working mechanism 11 operate more stably, and improving the integration of the lubricating oil temperature control device.

[0070] In this embodiment, the working oil, leakage oil, and lubricating oil are all essentially hydraulic oil. The different names mainly refer to the different working states of the hydraulic oil when it enters different pipelines. After the working oil, leakage oil, and lubricating oil are collected in the oil tank 3, the hydraulic oil in the oil tank 3 will be resupplyed to the working oil circuit module 1 and the lubrication module 4.

[0071] In some embodiments, the collection mechanism 21 can also be configured as an oil tank 3. The oil temperature detection mechanism 22 is used to detect the oil temperature in the oil tank 3. The pressure regulating mechanism 12 adjusts the working oil pressure according to the oil temperature detected by the oil temperature detection mechanism 22 in the oil tank 3. That is, the oil temperature detection mechanism 22 can directly detect the temperature of the mixed oil flowing into the oil tank 3, and more accurately know the oil supply temperature of the oil tank 3 to the lubrication module 4, and evaluate the impact of the leaked oil on the lubricating oil temperature. When the oil temperature detection mechanism 22 detects that the mixed oil temperature is equal to or greater than the preset oil temperature in the oil tank 3, it indicates that the leaked oil will cause the lubricating oil temperature to exceed the design standard, causing the lubricating oil over-temperature alarm. The oil temperature detection mechanism 22 will transmit the mixed oil temperature signal to the pressure regulating mechanism 12. The pressure regulating mechanism 12 can adjust its own switching amplitude according to the mixed oil temperature detected by the oil temperature detection mechanism 22 in the oil tank 3, thereby reducing the working oil pressure, reducing the leakage of high-temperature working oil from the working mechanism 11, and thus reducing the abnormal rise in lubricating oil temperature. The preset oil temperature set by the oil temperature detection mechanism 22 when detecting the leaking oil temperature at the leak location can be the same as or different from the preset oil temperature set when detecting the mixed oil temperature in the oil tank 3. For example, the preset oil temperature set by the oil temperature detection mechanism 22 when detecting the mixed oil temperature in the oil tank 3 can be lower than the preset oil temperature set when detecting the leaking oil temperature at the leak location. The preset oil temperature can be selected and set according to actual needs, and can transmit the corresponding oil temperature signal to the pressure regulating mechanism 12 for corresponding adjustment operation in a timely manner when the lubricating oil temperature rises abnormally.

[0072] See Figure 1 and Figure 4 The pressure regulating mechanism 12 includes a pressure relief valve and a preload adjusting component. The preload adjusting component is connected to the pressure relief valve and is used to adjust the preload of the elastic element 121 of the pressure relief valve to adjust the preset starting pressure value. The pressure relief valve is connected in parallel with the working mechanism 11. With this configuration, the pressure relief valve can preset the starting pressure value. The working oil pump 13 supplies oil to the working mechanism 11. When the working mechanism 11 is operating in a high-energy-consumption area, the working oil pressure inside the working mechanism 11 is high, and the overall working oil pressure of the working oil circuit module 1 is also high. When the working oil pressure is equal to or greater than the preset starting pressure value, the pressure relief valve will open in time to release air or oil to the working oil circuit module 1, causing the working oil pressure to decrease. When the working oil pressure is less than the preset starting pressure value, the pressure relief valve will close to maintain the sealing of the working oil circuit module 1. The pressure relief valve can dynamically regulate the working oil pressure.

[0073] When the oil temperature detection mechanism 22 detects that the leaking oil temperature is lower than the preset leaking oil temperature, or when the oil temperature detection mechanism 22 detects that the mixed oil temperature in the oil tank 3 is lower than the preset mixed oil temperature, the preset starting pressure value of the pressure relief valve can be kept unchanged.

[0074] When the oil temperature detection mechanism 22 detects that the temperature of the leaking oil or the oil temperature in the oil tank 3 is equal to or greater than the corresponding preset temperature, that is, when the oil temperature detection mechanism 22 detects that the temperature of the leaking oil is equal to or greater than the preset temperature of the leaking oil, or when the oil temperature detection mechanism 22 detects that the temperature of the mixed oil in the oil tank 3 is equal to or greater than the preset temperature of the mixed oil, the preload adjustment component lowers the preload of the pressure relief valve, and the preset starting pressure value decreases to reduce the working oil pressure. Specifically, when the oil temperature detection mechanism 22 detects that the temperature of the leaking oil or the oil temperature in the oil tank 3 is equal to or greater than the corresponding preset temperature, the oil temperature detection mechanism 22 will transmit the corresponding leaking oil temperature signal or mixed oil temperature signal to the pressure relief valve. The pressure relief valve can lower the preset starting pressure value, so that when the working oil pressure is at a lower pressure state, the pressure relief valve can open in time to reduce the working oil pressure, thereby reducing the leakage of high-temperature working oil from the working mechanism 11, the oil temperature in the oil tank 3 decreases, the lubricating oil temperature decreases accordingly, and thus reduces the situation of abnormal rise in lubricating oil temperature. See Figure 9 Through actual adjustment tests on the hydraulic coupling, the lubricating oil temperature reached the normal level. For every 0.1 bar decrease in the working oil temperature, the lubricating oil temperature decreased by 1°C. This conclusion was verified after multiple adjustments on several hydraulic couplings, breaking the traditional single-loop system temperature regulation method and realizing a pressure and temperature regulation ratio between two independent systems: the working oil and the lubricating oil.

[0075] See Figure 5 In this embodiment, the pressure relief valve may include a flow channel, a valve plate, and an elastic element 121. The valve plate may cover the flow channel, and the elastic element 121 is connected to the valve plate to provide a reset elastic force for the valve plate. When the working oil pressure is equal to or greater than the preset starting pressure value, the working oil can enter the flow channel and push open the valve plate for discharge. When the working oil pressure is less than the preset starting pressure value, the valve plate can block and close the flow channel under the thrust of the elastic force. The pressure relief valve can adjust the preset starting pressure value by adjusting the preload of the elastic element 121. For example, when the oil temperature detection mechanism 22 detects that the leaking oil temperature is equal to or greater than the preset oil temperature, the preload of the elastic element 121 can be reduced, making it easier for the valve plate to be pushed open by the working oil and for the flow channel to be more open, thereby making it easier for the working oil to flow out, thereby reducing the working oil pressure in the working oil circuit module 1, thereby reducing the oil pressure in the working mechanism 11 and reducing the leakage of the leaking oil.

[0076] The preload adjustment method for the elastic element 121 can be, but is not limited to, bolt rotation adjustment. Specifically, the preload adjustment assembly can include a bolt and a driving component connected in a transmission relationship. The elastic element 121 can be fitted onto the bolt. The driving component drives the bolt to rotate in the forward direction, which can compress the elastic element 121 and increase its preload. Conversely, the driving component drives the bolt to rotate in the reverse direction, which can loosen the elastic element 121 and reduce its preload. The driving component can be communicatively connected to the oil temperature detection mechanism 22 for convenient adjustment. The driving component can be, but is not limited to, a motor, a rotary cylinder, or a rotary hydraulic cylinder. Of course, the preload of the elastic element 121 can also be manually adjusted according to the oil temperature detected by the oil temperature detection mechanism 22. That is, the preload of the elastic element 121 can be adjusted by manually rotating the bolt while the elastic element 121 is fitted onto it.

[0077] Alternatively, the pressure regulating mechanism 12 can also be configured as a flow-type regulating component such as a switching valve, which can be connected in series upstream of the oil circuit of the working mechanism 11. By adjusting the input oil volume of the working mechanism 11, the oil pressure inside the working mechanism 11 can be indirectly adjusted, thereby reducing the leakage of leaking oil at the working mechanism 11.

[0078] In some embodiments, the working oil circuit module 1 includes a working oil pump 13. The upstream oil path of the working oil pump 13 is connected to the oil tank 3, and the downstream oil path of the working oil pump 13 is connected to the working mechanism 11. It is used to supply oil to the inner cavity of the working mechanism 11, meaning the working oil pump 13 can draw oil from the oil tank 3 and supply working oil into the inner cavity of the working mechanism 11 for transmission or driving motion. A pressure regulating mechanism 12 is located upstream of the oil path of the working mechanism 11 and can regulate the amount of oil delivered by the working oil pump 13 to the working mechanism 11. Specifically, the pressure relief valve of the pressure regulating mechanism 12 is connected in parallel with the working mechanism 11. The oil circuit of the working oil pump 13 is connected to both the pressure relief valve and the working mechanism 11. By reducing the preset starting pressure value of the pressure relief valve, the pressure relief valve can be opened when the working oil pressure in the working oil circuit module 1 reaches a lower oil pressure, so as to discharge the gas in the working oil circuit module 1 or return the working oil output by the working oil pump 13 to the oil tank 3, thereby reducing the working oil pressure at the working mechanism 11.

[0079] See Figure 4The working oil circuit module 1 may also include a working oil cooler 14. The working oil cooler 14 can be connected between the downstream of the oil circuit of the working mechanism 11 and the oil tank 3. The working oil cooler 14 can cool the working oil before returning it to the oil tank 3 to ensure that the working oil temperature is within the qualified design range. However, the working oil temperature is much higher than the lubricating oil temperature, which is generally around 90°C. The design standard for the working oil temperature is less than 110°C. A large amount of heat generated in the working oil circuit can be directly cooled by the working oil cooler 14 before circulation. The pressure relief valve can be located on the outlet side of the working oil cooler 14 to regulate the working oil circuit pressure. An exhaust pipe 17 can also be connected to the working oil cooler 14. When the exhaust pipe 17 is opened, it can be used to exhaust excess gas in the working oil circuit at the working oil cooler 14. If a small amount of working oil is discharged, the discharged working oil can flow back to the oil tank 3.

[0080] See Figures 1-3 In some embodiments, the lubrication module 4 includes a main lubricating oil pump 41 and a lubricating oil cooler 42. The upstream oil path of the main lubricating oil pump 41 is connected to the oil tank 3, and the lubricating oil cooler 42 is located downstream of the oil path of the main lubricating oil pump 41. That is, the oil tank 3, the main lubricating oil pump 41, and the lubricating oil cooler 42 can be connected in sequence. The main lubricating oil pump 41 can provide power for conveying lubricating oil, and the lubricating oil cooler 42 can cool the lubricating oil. The working mechanism 11 is located downstream of the oil path of the lubricating oil cooler 42. The lubricating oil output from the lubricating oil cooler 42 can enter the lubrication position 46 on the working mechanism 11 to lubricate the lubrication position 46 and reduce the friction loss of the working mechanism 11. Moreover, the lubricating oil cooler 42 is located close to the working mechanism 11, which can keep the cooled lubricating oil at a low temperature when acting on the working mechanism 11, thereby improving the lubrication performance of the lubricating oil.

[0081] In this embodiment, the working mechanism 11 may include a pump-turbine mechanism, which includes a pump wheel 111 and a turbine 112 that perform hydraulic coupling motion. The working mechanism 11 has multiple lubrication points 46. The working mechanism 11 may also include a matching working pump and a transmission component, which are connected in a transmission manner. The lubrication points 46 may include the rotational support position of the pump wheel 111, the rotational support position of the turbine 112, the motion connection position of the working pump, and the motion connection position of the transmission component. The transmission component may be, but is not limited to, a gear. The lubricating oil output from the lubricating oil cooler 42 can lubricate not only the support bearings of the pump wheel 111 and the turbine 112, but also the connecting bearings and transmission gears of the working pump and the transmission component. The lubricating oil after lubricating the lubrication points 46 can flow back into the oil tank 3, or the lubricating oil can be lubricated at some of the lubrication points 46 and then drained, forming an open circuit. The lubricating oil can be in an independent circulation loop. The heat generated by the lubricating oil is mainly cooled by the lubricating oil cooler 42 to ensure that the lubricating oil temperature is within the design range. For example, when the lubricating oil cooler 42 has sufficient capacity, under normal operating conditions, the working oil does not rise abnormally or exceed the temperature. At this time, the lubricating oil return temperature will reach 58°C. After being cooled by the lubricating oil cooler 42, the lubricating oil supply temperature can be reduced to 44.5°C. That is, the lubricating oil supply temperature is generally around 45°C, and the design standard for the lubricating oil temperature can be less than 65°C.

[0082] See Figure 3 In some embodiments, the lubrication module 4 further includes a dual filter 47, which can be located downstream of the oil passage of the lubricating oil cooler 42. The dual filter 47 can fully filter the lubricating oil before it enters the working mechanism 11, with high filtration accuracy, reducing the possibility of impurities in the lubricating oil damaging the moving parts on the working mechanism 11.

[0083] See Figures 1-3 In some embodiments, the lubrication module 4 further includes an auxiliary oil pump 43 and an oil supply line 44. The upstream oil line of the auxiliary oil pump 43 is connected to the oil tank 3, meaning that the auxiliary oil pump 43 can draw oil from the oil tank 3. The upstream oil line of the oil supply line 44 is connected to the downstream oil line of the auxiliary oil pump 43, and the downstream oil line of the oil supply line 44 is connected to the downstream oil line of the working mechanism 11. The oil supply line 44 is used to supply oil to the working oil circuit module 1, meaning that the oil supply line 44 can connect the lubrication module 4 and the working oil circuit module 1. When the auxiliary oil pump 43 starts running, it can draw lubricating oil from the oil tank 3 and supply it to the working oil circuit module 1 through the oil supply line 44, ensuring that the working oil circuit module 1 is full of oil even in the standby state before startup.

[0084] See Figure 3In this embodiment, a first throttling orifice plate 45 is installed inside the oil supply pipeline 44. The circumferential outer wall of the first throttling orifice plate 45 is connected to the inner wall of the oil supply pipeline 44. The first throttling orifice plate 45 is provided with a plurality of throttling orifices. The throttling orifices are used to throttle the lubricating oil flowing through the oil supply pipeline 44 to avoid excessive loss of lubricating oil to the working oil circuit module 1, which would cause a lack of lubricating oil in the lubrication module 4 and result in abnormal operation.

[0085] See Figure 1 and Figure 4 In some embodiments, the working oil circuit module 1 further includes a first check valve 15, which can be located at the output position of the working oil pump 13 to reduce backflow of working oil. Additionally, the working oil circuit module 1 may also include a second throttling orifice plate 16, which can be located at the outlet end of the first check valve 15 to throttle the working oil in the working oil circuit, reducing excessive flow of working oil into the working mechanism 11. The lubrication module 4 may also include a second check valve, which can be located at the output position of the main lubricating oil pump 41 to reduce backflow of lubricating oil.

[0086] See Figures 1-2 and Figure 6 Another embodiment of this application provides a hydraulic coupling, including the above-mentioned lubricating oil temperature regulating device for a hydraulic coupling. The working mechanism 11 is configured as a pump wheel turbine mechanism, which includes a pump wheel 111, a turbine 112 and a housing 113. The pump wheel 111 and the turbine 112 are disposed on the housing 113 and are arranged opposite to each other to form a working chamber. Working oil is introduced into the working chamber, thereby forming an oil ring hydraulic transmission between the pump wheel 111 and the turbine 112, so that the rotation of the pump wheel 111 can drive the turbine 112 to rotate. Both the pump impeller 111 and the turbine 112 need to rotate at high speed. There is a large gap between the circumference of the rotating turbine 112 and the housing 113. Due to the rotation requirements of the turbine 112 and the pump impeller 111, it is impossible to completely seal the working oil circuit module 1 through the machining and assembly method. During the operation of the hydraulic coupling, the high-speed rotation of the pump impeller turbine mechanism pressurizes the working oil in the working chamber. This causes the working oil to be thrown out through the gap between the turbine 112 and the housing 113 after being heated in the working chamber, forming leakage oil. The leakage oil will mix with the lubricating oil or be directly discharged into the oil tank 3. Since the temperature difference between the leakage oil and the lubricating oil is large, it can generally reach more than 30°C. Therefore, a small amount of leakage oil will have a significant impact on the temperature of the lubricating oil.

[0087] This embodiment collects leaked oil using a collection mechanism 21 and monitors the oil temperature in real time using an oil temperature detection mechanism 22. When the oil temperature detection mechanism 22 detects that the leaked oil temperature is equal to or greater than a preset oil temperature, it transmits the leaked oil temperature signal to a pressure regulating mechanism 12. The pressure regulating mechanism 12 adjusts its own switching amplitude according to the leaked oil temperature detected by the oil temperature detection mechanism 22, thereby reducing the working oil pressure and decreasing the leakage of high-temperature working oil from the pump turbine mechanism. This reduces the abnormal rise in lubricating oil temperature, especially when the cooler's cooling capacity meets requirements and there are no abnormalities in the lubricating oil quantity or bearings. This effectively reduces the rise in lubricating oil temperature, achieving flexible adjustment of the two characteristic parameters: working oil pressure and lubricating oil temperature, and making adjustment convenient.

[0088] Furthermore, when the lubricating oil temperature is too high, according to conventional designs, the lubricating oil cooler 42 is typically used to increase the cooling capacity of the lubricating oil and reduce frictional heat generation during bearing operation, or the lubricating oil supply is increased to lower the lubricating oil temperature. However, the working oil of the hydraulic coupling is an independent closed-loop circulation system. In conventional designs, the working oil does not affect the temperature of the lubricating oil. But through the design of the lubricating oil temperature regulating device for the hydraulic coupling in this embodiment, the lubricating oil temperature can be changed by adjusting the working oil pressure, which reduces the cooling capacity requirement of the lubricating oil cooler 42 and increases the redundancy of the lubricating oil cooler 42.

[0089] In this embodiment, the rotational speed of the hydraulic coupling during operation is adjusted by the thickness of the oil ring formed by the working oil within the working chamber of the pump wheel turbine mechanism. During high-speed rotation, the energy of the high-speed input shaft connected to the pump wheel 111 is transmitted to torque through the hydraulic coupling of the working oil, causing the output rotor connected to the turbine 112 to rotate synchronously. However, this hydraulic transmission process generates a significant amount of energy loss, which is converted into heat energy, thereby heating the working oil. See also Figure 7 This is a schematic diagram illustrating the relationship between the rotational speed and power of the hydraulic coupler according to an embodiment of this application. In particular, in the design of the hydraulic coupler, the region with the highest energy consumption is within 66% of the rated speed, i.e., Pv. max The high-energy-consumption zone shown indicates the area with the highest heat generation and high working oil temperature. Based on actual operation, prolonged operation in this high-energy-consumption zone leads to excessively high lubricating oil temperature, triggering an alarm. For example, in this high-energy-consumption zone, the working oil temperature can reach 140℃ to 150℃, and the lubricating oil temperature can reach 70℃ to 80℃. (See [reference needed]). Figure 8As can be seen, an alarm will be triggered when the lubricating oil temperature reaches 67.1℃, with an alarm value of 65℃. All other parameters are normal. The lubricating oil temperature continues to rise as the engine speed increases. During operation, the system needs to quickly pass through this high-energy-consumption zone. The lubricating oil temperature control device for the hydraulic coupler in this embodiment allows for adjustment of the working oil pressure to ensure that both the lubricating oil temperature and the operating oil temperature remain within the required range. This extends the operating time of the hydraulic coupler in the high-energy-consumption zone. For example, by reducing the working oil pressure, the lubricating oil temperature can be lowered, preventing abnormal increases in the lubricating oil temperature in the high-energy-consumption zone. The hydraulic coupler can operate in the high-energy-consumption zone for a period of time as needed, reducing oil temperature over-temperature alarms. This expands the continuous operating range of the electric main feedwater pump system of the nuclear power unit under low flow rates, enabling numerous testing requirements to be met. It solves equipment operation and commissioning problems, improves equipment reliability, and broadens maintenance methods, laying a solid foundation for the safe and reliable operation of the nuclear power unit.

[0090] See Figures 1-2 In some embodiments, the hydraulic coupler further includes a speed regulation module 5, which is connected to the pump turbine mechanism and is used to regulate the output speed of the pump turbine mechanism. The upstream oil circuit of the speed regulation module 5 is connected to the lubrication module 4, and the downstream oil circuit of the speed regulation module 5 is connected to the oil tank 3. With this configuration, the lubricating oil in the lubrication module 4 can also enter the regulating oil circuit module where the speed regulation module 5 is located, to drive and regulate the switching operation of the speed regulation module 5, and also to fill the speed regulation oil circuit module with oil.

[0091] In this embodiment, the speed regulation module 5 may include a regulating valve 51 and a scoop tube connected to each other. The scoop tube is connected to the pump wheel turbine mechanism and is used to discharge the working oil in the working chamber. The downstream oil passage of the scoop tube can be connected to the oil tank 3. The regulating valve 51 can adjust the opening of the scoop tube, thereby adjusting the discharge amount of working oil, and thus obtaining different working oil pressures in the working chamber. The higher the oil pressure in the working chamber, the greater the torque transmitted from the pump wheel 111 to the turbine 112, and the greater the output speed. The regulating valve 51 may be, but is not limited to, a proportional regulating valve. The speed regulation module 5 is similar to the speed regulation structure of a traditional hydraulic coupler, and will not be described in detail here.

[0092] During normal operation, the working oil pump 13 draws oil from the oil tank 3 and, through the regulating valve 51, fills the working chamber of the pump turbine assembly with oil. After the working oil performs work in the working chamber, it is drawn out from the movable scoop tube and, under dynamic pressure, returns to the coupling after passing through the working oil cooler 14 and the regulating valve 51. During this process, a small amount of working oil leaks directly into the oil tank 3 through the gap in the working chamber. Because the working oil pump 13 is constantly running, the pressure regulating mechanism 12 dynamically regulates the working oil pressure, and excess working oil flows into the oil tank 3. In the working oil circulation loop, the pressure regulating mechanism 12 can maintain the working oil pressure within the preset starting pressure range. This circulation process is not completely closed but dynamically regulated, and the pressure and flow rate in the working oil loop system can be adjusted by adjusting the preset starting pressure value of the pressure regulating mechanism 12. The preset starting pressure value can be selected from 1.0 bar to 2.5 bar.

[0093] See Figure 1 and Figure 10 Another embodiment of this application provides a lubricating oil temperature control method, which includes the following steps:

[0094] S200. Obtain the leakage oil temperature of the working mechanism 11 of the working oil circuit module 1. The method of obtaining the leakage oil temperature may include, but is not limited to, adding an oil temperature detection mechanism 22 directly at the leakage location of the working mechanism 11, or adding the aforementioned leakage oil collection module 2, which can more accurately detect the temperature of the collected leakage oil.

[0095] S300. Compare the leaked oil temperature with the preset oil temperature. The oil temperature detection mechanism 22 may include a temperature sensor and a controller that are connected in communication. After the temperature sensor obtains the leaked oil temperature, it transmits the oil temperature signal to the controller. The controller can send a start signal to the pressure regulating mechanism 12 to perform pressure regulation operation after comparing the leaked oil temperature with the preset oil temperature. It can monitor whether the leaked oil temperature exceeds the limit in real time.

[0096] S400 When the temperature of the leaking oil is equal to or greater than the preset oil temperature, reduce the working oil pressure in the working mechanism 11 of the working oil circuit module 1. That is, when the temperature of the leaking oil exceeds the preset oil temperature, it is necessary to reduce the leakage amount of the leaking oil in time by reducing the working oil pressure, thereby indirectly reducing the abnormal rise of lubricating oil.

[0097] This embodiment can monitor the leakage oil temperature in real time. When the leakage oil temperature is equal to or greater than the preset oil temperature, the leakage amount of the leakage oil is reduced by lowering the working oil pressure. This realizes the flexibility of adjusting the correlation between the two characteristic parameters, working oil pressure and lubricating oil temperature, and is convenient to adjust and use.

[0098] In some embodiments, the leakage oil temperature of the working mechanism 11 of the working oil circuit module 1 can also be indirectly obtained. For example, an oil tank 3 can be provided, and the working oil circuit, leakage oil circuit and lubricating oil circuit can share the same oil tank 3. The oil tank 3 supplies oil to the working oil circuit and the lubricating oil circuit. After the leakage oil leaks from the working mechanism 11 of the working oil circuit module 1, it will flow back directly into the oil tank 3 and form a mixed oil with the returned working oil and lubricating oil. In this embodiment, the temperature of the mixed oil in the oil tank 3 can also be obtained. The mixed oil in the oil tank 3 is compared with the size of the preset oil tank. When the oil temperature of the mixed oil in the oil tank 3 is equal to or greater than the preset oil temperature, it can be determined that even if the cooling capacity of the lubricating oil cooler 42 meets the requirements, the lubricating oil will still overheat when the cooling range of the lubricating oil cooler 42 is within the design range, causing an abnormal oil temperature rise alarm. Therefore, when the oil temperature of the mixed oil in the oil tank 3 is equal to or greater than the preset oil temperature, the working oil pressure in the working mechanism 11 of the working oil circuit module 1 can be reduced to reduce the leakage of the leakage oil, thereby indirectly reducing the abnormal rise of the lubricating oil.

[0099] In some embodiments, when the temperature of the leaking oil is lower than the preset oil temperature, the working oil pressure in the working oil circuit module 1 is adjusted to be within the rated oil pressure range. That is, when the temperature of the leaking oil is lower than the preset oil temperature, the leakage of the leaking oil has little impact on the lubricating oil temperature. In this case, the adjustment state of the pressure regulating mechanism 12 can be kept unchanged, that is, the pressure relief valve can keep the preset starting pressure value unchanged, and the rated oil pressure can be configured to the preset starting pressure value. The working mechanism 11 in the working oil circuit module 1 can be kept to work normally under the working oil pressure.

[0100] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0101] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A lubricating oil temperature regulating device for a hydraulic coupling, characterized in that, The lubricating oil temperature control device for the hydraulic coupling includes: The working oil circuit module (1) includes a working mechanism (11) and a pressure regulating mechanism (12). The pressure regulating mechanism (12) is located upstream of the oil circuit of the working mechanism (11) and is used to regulate the working oil pressure of the working mechanism (11). The working mechanism (11) has a lubrication position (46). Lubrication module (4), which is connected to the lubrication position (46) of the working mechanism (11) and is used to lubricate the working mechanism (11); Leakage oil collection module (2), the leakage oil collection module (2) includes a collection mechanism (21) and an oil temperature detection mechanism (22). The collection mechanism (21) is set on the working mechanism (11) and is used to collect the leakage oil formed by the leakage of the working mechanism (11). The collection mechanism (21) is connected to the upstream oil line of the lubrication module (4). The oil temperature detection mechanism (22) is set on the collection mechanism (21) and is used to detect the oil temperature of the leakage oil in the collection mechanism (21). The oil temperature detection mechanism (22) is communicatively connected to the pressure regulating mechanism (12). The pressure regulating mechanism (12) adjusts the oil pressure of the working oil according to the oil temperature of the leakage oil detected by the oil temperature detection mechanism (22). The lubricating oil temperature control device for the hydraulic coupling includes: The downstream oil passage of the working mechanism (11) is connected to the oil tank (3); the upstream oil passage of the lubrication module (4) is connected to the oil tank (3), and at least part of the downstream oil passage of the lubrication module (4) flows back into the oil tank (3). Wherein, the downstream oil passage of the collecting mechanism (21) is connected to the oil tank (3), or the collecting mechanism (21) is configured as the oil tank (3), the oil temperature detection mechanism (22) is used to detect the oil temperature in the oil tank (3), and the pressure regulating mechanism (12) regulates the working oil pressure according to the oil temperature of the oil tank (3) detected by the oil temperature detection mechanism (22); The lubrication module (4) also includes: An auxiliary oil pump (43) is connected upstream of the oil line of which is connected to the oil tank (3); The oil supply line (44) is connected upstream to the oil supply line downstream of the auxiliary oil pump (43) and downstream to the oil supply line downstream of the working mechanism (11). The oil supply line (44) is used to supply oil to the working oil circuit module (1).

2. The lubricating oil temperature regulating device for a hydraulic coupling according to claim 1, characterized in that, The pressure regulating mechanism (12) includes a pressure relief valve and a pre-tightening force regulating component. The pre-tightening force regulating component is connected to the pressure relief valve and is used to regulate the preset starting pressure value of the pressure relief valve. The pressure relief valve is arranged in parallel with the working mechanism (11). When the oil temperature detection mechanism (22) detects that the temperature of the leaking oil or the oil temperature in the oil tank (3) is equal to or greater than the corresponding preset temperature, the pre-tightening force adjustment component lowers the pre-tightening force of the pressure relief valve, and the preset starting pressure value is reduced to reduce the working oil pressure.

3. The lubricating oil temperature regulating device for a hydraulic coupling according to claim 1, characterized in that, The working oil circuit module (1) includes a working oil pump (13), the upstream oil path of the working oil pump (13) is connected to the oil tank (3), and the downstream oil path of the working oil pump (13) is connected to the working mechanism (11), for supplying oil to the inner cavity of the working mechanism (11).

4. The lubricating oil temperature regulating device for a hydraulic coupling according to claim 1, characterized in that, The lubrication module (4) includes: The main lubricating oil pump (41) is connected to the oil tank (3) upstream of the oil line of the main lubricating oil pump (41); A lubricating oil cooler (42) is provided downstream of the oil passage of the main lubricating oil pump (41); The lubrication position (46) of the working mechanism (11) is located downstream of the oil passage of the lubricating oil cooler (42), and the lubricating oil output by the lubricating oil cooler (42) is used to lubricate the working mechanism (11).

5. A hydraulic coupling, characterized in that, The lubricating oil temperature regulating device for a hydraulic coupling according to any one of claims 1-4, wherein the working mechanism (11) is configured as a pump wheel turbine mechanism.

6. The hydraulic coupler according to claim 5, characterized in that, The hydraulic coupling also includes a speed adjustment module (5), which is connected to the pump turbine mechanism and is used to adjust the output speed of the pump turbine mechanism. The upstream oil circuit of the speed adjustment module (5) is connected to the lubrication module (4), and the downstream oil circuit of the speed adjustment module (5) is connected to the oil tank (3).

7. A method for adjusting the temperature of lubricating oil in a hydraulic coupling, characterized in that, The lubricating oil temperature control method includes: Obtain the leakage oil temperature of the working mechanism (11) of the working oil circuit module (1); Compare the leaked oil temperature with the preset oil temperature; When the temperature of the leaking oil is equal to or greater than the preset oil temperature, the working oil pressure in the working mechanism (11) of the working oil circuit module (1) is reduced.

8. The lubricating oil temperature regulation method according to claim 7, characterized in that, When the temperature of the leaking oil is lower than the preset oil temperature, the working oil pressure in the working oil circuit module (1) is adjusted to be within the rated oil pressure range.

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