A rocker arm cooling system

Abstract

The present application relates to the technical field of cooling devices, and discloses a rocker arm cooling system, including a water cooling device, a cooling channel, a temperature sensor and a controller; a cooling water inlet and a cooling water outlet connected to the cooling channel are provided on the rocker arm; a cooling water inlet valve is connected to the cooling water outlet through a water pipe; the cooling water outlet is connected to the cooling water inlet through a water pipe; a spray cooling block is provided at the cooling water outlet on the rocker arm, which is used to spray out the cooling water cooled by the spray cooling block; the temperature sensor is electrically connected to the controller; the controller is used to issue a corresponding cooling instruction; the water cooling device and the cooling water inlet valve are both controllably connected to the controller, which is used to execute the cooling instruction issued by the controller. The present application has the advantage of improving the cooling effect of the rocker arm.

Description

Technical Field

[0001] The present application relates to the technical field of cooling devices, and in particular to a rocker arm cooling system. Background Art

[0002] The gear reduction mechanism in the inner cavity of the coal mining machine rocker arm is an important component of the coal mining machine cutting device. It can adjust the input high speed to a low speed to provide a higher torque for the cutting drum. At present, the heat dissipation of the coal mining machine rocker arm gear is mostly transferred to the rocker arm housing through lubricating oil, and then the heat of the housing is taken away by the cooling water outside the housing for heat dissipation. The heat dissipation method and path are single, which reduces the heat dissipation efficiency, thereby limiting the output power of the entire rocker arm cutting part, so that it can only operate at a lower power, limiting the mining efficiency of the whole machine.

[0003] As the geological conditions of coal mining become worse, high-hardness gangue becomes more and more common, increasing the cutting load of the rocker arm. At the same time, the emergence of large-angle working faces makes the lubrication conditions of the rocker arm worse, the lubrication effect is reduced, and the heat dissipation difficulty of the rocker arm is increased, which in turn hinders mining efficiency. Summary of the invention

[0004] In order to improve the cooling effect of the rocker arm, so as to improve the mining efficiency and reduce the limitation of the heat dissipation problem on the output power of the coal mining machine cutting head, the present application provides a rocker arm cooling system.

[0005] In a first aspect, the present application provides a rocker arm cooling system, which adopts the following technical solution:

[0006] A rocker arm cooling system, comprising a water cooling device, a cooling channel spirally arranged in a rocker arm structure, a temperature sensor arranged on the rocker arm, and a controller; the rocker arm is provided with a cooling water inlet and a cooling water outlet connected to the cooling channel, the cooling water inlet is provided with a cooling water inlet valve; the cooling water inlet valve is connected to the cooling water outlet of the water cooling device through a water pipe; the cooling water outlet is close to one end of the rocker arm where a roller is arranged; the cooling water outlet is connected to the cooling water inlet of the water cooling device through a water pipe; the rocker arm is provided with a plurality of spray cooling blocks connected to the cooling water outlet at the cooling water outlet, for spraying out the cooling water cooled by the spray cooling blocks;

[0007] The temperature sensor is electrically connected to the controller, and is used to sense the temperature of the rocker arm and transmit a temperature signal to the controller; the controller responds to the temperature signal and issues a corresponding cooling instruction;

[0008] The water cooling device and the cooling water inlet valve are both controllably connected to the controller and are used to execute the temperature reduction instruction issued by the controller.

[0009] By adopting the above technical solution, the spiral cooling channel increases the contact area between the cooling water and the rocker housing, and then increases the contact area between the cooling water and the high-temperature lubricating oil inside the rocker housing, thereby improving the cooling efficiency. At the same time, the temperature sensor installed on the rocker arm can monitor the temperature at different positions inside the rocker arm, collect the temperature parameters of the rocker arm under different working conditions in real time and transmit them to the controller for timely cooling, thus achieving efficient and accurate cooling of the rocker arm.

[0010] Optionally, the water cooling device includes multiple stages of water cooling boxes connected end to end in sequence through pipes, the inner wall of the water cooling box is provided with semiconductor cooling fins, the outer wall of the water cooling box is provided with heat sinks at positions corresponding to the semiconductor cooling fins, and the heat sinks located between adjacent water cooling boxes are fixedly connected to the adjacent water cooling boxes.

[0011] By adopting the above technical solution, the water cooling device achieves a more efficient and reliable cooling effect through technical means such as multi-stage water cooling box design, the combination of semiconductor cooling fins and heat sinks, and the fixed connection of heat sinks of adjacent water cooling boxes.

[0012] Optionally, the temperature sensor is provided in plurality, including a first temperature sensor and a second temperature sensor, wherein the first temperature sensor is located on the rocker arm near a cooling water inlet and is used to obtain a first temperature parameter; the second temperature sensor is located on the rocker arm near a cooling water outlet and is used to obtain a second temperature parameter;

[0013] Based on a first temperature parameter and a second temperature parameter acquired in real time;

[0014] When the first temperature parameter and / or the second temperature parameter is greater than the corresponding temperature reference value, the controller issues a first temperature reduction instruction;

[0015] The water cooling device starts the water cooling device or increases the cooling power of the water cooling device in response to the first temperature reduction instruction;

[0016] When the first temperature parameter or the second temperature parameter is greater than the corresponding temperature reference value, if the controller obtains a manual input instruction, the controller responds to the manual input instruction first and issues a second temperature reduction instruction; wherein the manual input instruction includes a manually input preset temperature parameter and working power;

[0017] The water cooling device responds to the second temperature reduction instruction and starts or adjusts the water cooling device according to preset temperature parameters and working power.

[0018] By adopting the above technical scheme, the controller compares the temperature with the manually preset temperature parameters. When it is greater than the preset temperature parameters, the controller issues an instruction to start the water cooling device to perform cooling operation. The working power of the water cooling device, that is, the cooling effect, can be controlled by the controller through the manually preset temperature parameters to avoid waste of resources caused by long-term high-power operation. At the same time, it can avoid problems such as high rocker arm temperature and insufficient cooling under certain harsh working conditions. Compared with the traditional cooling method, the cooling temperature can be set arbitrarily by humans, thereby reducing the high temperature resistance requirements for the manufacturing materials of the rocker arm and internal transmission components. In the extreme case of harsh working conditions in thin coal seams, if the overall size of the rocker arm is small and the cutting power requirement is high, its heat generation is huge and cannot be met by the traditional cooling method. The present invention can improve the cooling efficiency by increasing the power of the water cooling device to meet the cooling requirements.

[0019] Optionally, within a set time period, based on the acquired first temperature parameter and second temperature parameter;

[0020] Performing a fast Fourier transform on the first temperature parameter and the second temperature parameter to convert the time domain signal into a frequency domain signal; obtaining a first frequency domain signal and a second frequency domain signal respectively; fitting a first waveform of the first frequency domain signal and a second waveform of the second frequency domain signal; obtaining the number of peaks in the first waveform and the number of peaks in the second waveform;

[0021] and analyzing in combination with the difference between the second temperature parameter and the first temperature parameter;

[0022] If the sum of the number of peaks in the first waveform and the number of peaks in the second waveform, that is, the peak sum, is greater than the preset peak reference value; and if the difference is greater than the first preset value or less than the second preset value, the cooling power corresponding to the first cooling instruction is adjusted according to the positive correlation between the peak sum and / or the difference.

[0023] By adopting the above technical solutions, through frequency domain signal analysis, waveform fitting and peak number statistics, difference analysis and intelligent adjustment mechanisms, in-depth analysis and intelligent control of rocker arm temperature are achieved. This not only helps to improve the cooling effect and system reliability, but also improves the operating efficiency and safety of the entire mechanical system.

[0024] Optionally, the rocker arm is provided with an infrared camera device for obtaining an infrared image of the rocker arm;

[0025] Extracting a first feature object and a second feature object from the infrared imaging image, the first feature object corresponding to the area where the first temperature sensor is located, and the second feature object corresponding to the area corresponding to the second temperature sensor; matching a corresponding first infrared temperature value according to the first feature object; matching a corresponding second infrared temperature value according to the second feature object;

[0026] According to the first infrared temperature value, the first temperature parameter is corrected; the corrected first temperature parameter = the first temperature parameter + a1 × (the first infrared temperature value - the first reference temperature value); wherein a1 is the correction coefficient, and the first reference temperature value is a preset fixed value;

[0027] According to the second infrared temperature value, the second temperature parameter is corrected; the corrected second temperature parameter=the second temperature parameter+a2×(the second infrared temperature value-the second reference temperature value); wherein a2 is the correction coefficient, and the second reference temperature value is a preset fixed value.

[0028] By adopting the above technical solution, since the temperature sensor collects temperature in a limited spatial range and is basically point sampling, it is inevitable that there will be errors in the acquisition of temperature; and when the coal mining machine is working underground, it often faces challenges such as insufficient light, large dust, and limited field of view, and the stability and authenticity of the temperature sensor data are also difficult to guarantee. Infrared cameras can penetrate smoke and dust and provide clear images, which helps operators or automatic control systems better understand the working status and surrounding environment of the coal mining machine.

[0029] Optionally, the spray cooling block includes an atomizing nozzle, and when the first temperature parameter or the second temperature parameter is greater than a corresponding temperature reference value:

[0030] The opening of the cooling water inlet valve is adjusted according to the positive correlation between the difference between the first temperature parameter and the corresponding temperature reference value; the greater the difference between the first temperature parameter and the corresponding temperature reference value, the greater the opening of the cooling water inlet valve; the smaller the difference between the first temperature parameter and the corresponding temperature reference value, the smaller the opening of the cooling water inlet valve;

[0031] Alternatively, the opening of the cooling water inlet valve is adjusted according to the positive correlation between the difference between the second temperature parameter and the corresponding temperature reference value; the greater the difference between the second temperature parameter and the corresponding temperature reference value, the greater the opening of the cooling water inlet valve; the smaller the difference between the second temperature parameter and the corresponding temperature reference value, the smaller the opening of the cooling water inlet valve.

[0032] By adopting the above technical solution, through the introduction of atomizing nozzles and the intelligent adjustment mechanism of the cooling water inlet valve, the working efficiency and cooling effect of the spray cooling block are significantly improved. It not only helps to improve the cooling effect of the rocker arm and the reliability of the system, but also improves the operating efficiency and energy-saving performance of the entire mechanical system.

[0033] Optionally, the spray cooling block includes a nozzle, and a shielding member for shielding the nozzle is provided at the nozzle of the nozzle, the shielding member is elastically connected to the nozzle through an elastic member, and the extension and retraction direction of the shielding member is consistent with the flow direction of cooling water in the nozzle; the cooling water is sprayed out through the gap between the nozzle and the shielding member.

[0034] By adopting the above technical solution, the expansion and contraction direction of the shielding member is consistent with the flow direction of the cooling water in the nozzle. When the pressure of the cooling water increases, the water flow impacts the shielding member, causing the elastic member to stretch. In this way, the gap between the nozzle and the shielding member will become larger, allowing more cooling water to be sprayed out at a higher speed. On the contrary, when the pressure of the cooling water decreases, the elastic member will retract, causing the gap to become smaller, reducing the amount of cooling water sprayed out.

[0035] Optionally, the shielding member includes a protruding portion protruding toward the inside of the spout, and the orthographic projection of the periphery of the shielding member away from the protruding portion at the spout covers the spout.

[0036] By adopting the above technical solution, when the pressure of the cooling water increases, the protrusion will be impacted by the water flow, causing the shielding member to be displaced as a whole or in part, thereby changing the size of the gap between the nozzle and the shielding member. This design enables the spray cooling block to more accurately adjust the amount and speed of cooling water sprayed according to the pressure of the cooling water, thereby enhancing the cooling effect. At the same time, since the shielding member can completely or partially block the nozzle, the system can reduce or stop the spraying of cooling water when a large amount of cooling water is not needed, further improving the control accuracy and energy-saving performance, and can also reduce the entry of foreign particles into the nozzle.

[0037] Optionally, the spray cooling block includes a nozzle, the nozzle includes a water outlet, a rotating groove is provided on the outer peripheral side of the nozzle, a rotating ring is rotatably connected in the rotating groove, a shielding plate for shielding the water outlet is fixedly connected to the rotating ring, a plurality of spray holes are provided on the shielding plate, and the plurality of spray holes are unevenly distributed.

[0038] By adopting the above technical solution, multiple spray holes are set on the shielding plate, and these spray holes are unevenly distributed, so that the cooling water can form a more complex and diverse spray pattern when it is sprayed. This uneven distribution of spray holes helps to optimize the cooling effect and ensure that the cooling water can more evenly cover the surface to be cooled. Through the design of the rotating ring and the shielding plate, the spray cooling block can flexibly adjust the spray pattern and flow rate of the cooling water according to actual needs, thereby improving the cooling effect.

[0039] Optionally, an elastic membrane is provided at the injection hole, and a cross hole is opened on the elastic membrane.

[0040] By adopting the above technical solution, the elastic membrane has good elasticity and deformation ability, and can dynamically block and open the injection hole. The shape of the cross hole allows the elastic membrane to deform more easily when under pressure, thereby adjusting the opening degree of the injection hole. At the same time, the cross hole can also ensure that the cooling water forms a more uniform and delicate spray effect when it is sprayed.

[0041] In summary, the present application includes at least one of the following beneficial technical effects:

[0042] The rocker arm cooling system achieves efficient and precise cooling of the rocker arm through the use of spiral cooling channels, temperature sensors and controllers, spray cooling technology, and integrated control of the water cooling device and the cooling water inlet valve. This design not only improves the service life and reliability of the rocker arm, but also helps to improve the performance and stability of the entire mechanical system. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a schematic diagram of the rocker arm cooling device and system composition structure.

[0044] Figure 2 It is a schematic diagram of the cooling system working process.

[0045] Figure 3 It is a cross-sectional schematic diagram of the rocker arm cooling structure.

[0046] Figure 4 It is a schematic diagram of the overall structure of the water cooling device.

[0047] Figure 5 It is a schematic diagram showing the flow direction of cooling water in a water cooling device.

[0048] Figure 6 It is a cross-sectional schematic diagram of the water cooling box structure.

[0049] Figure 7 It is a schematic diagram of the first structure of the spray cooling block.

[0050] Figure 8 It is a schematic diagram of the second structure of the spray cooling block.

[0051] Fig. 9 It is a schematic diagram of the third structure of the spray cooling block.

[0052] Attached figures: 1. roller; 2. rocker arm; 3. cooling water inlet valve; 4. water cooling device; 5. water cooling connecting pipe; 6. DSP industrial computer; 7. traction unit; 8. temperature sensor; 9. heat sink; 10. first water cooling box; 11. first water pipe; 12. second water cooling box; 13. second water pipe; 14. third water cooling box; 15. semiconductor cooling sheet; 16. atomizing nozzle; 17. nozzle; 18. shielding member; 19. elastic member; 20. water outlet; 21. rotating groove; 22. rotating ring; 23. shielding plate; 24. injection hole; 25. elastic membrane; 26. cross hole; 27. raised portion. DETAILED DESCRIPTION

[0053] Embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings.

[0054] In the description of this specification, the description with reference to the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0055] The present application embodiment discloses a rocker arm 2 cooling system, referring to Figure 1 , Figure 2 and Figure 3 , including a water cooling device 4, a cooling channel, a temperature sensor 8 and a controller. Among them, the rocker mechanism is composed of a rocker arm 2, a traction part 7 and a roller 1. The cooling channel is opened in the shell structure of the rocker arm 2 and spirally extends along the length direction of the rocker arm 2. Correspondingly, a cooling water inlet and a cooling water outlet connected to the cooling channel are opened on the rocker arm 2, and a cooling water inlet valve 3 is installed at the cooling water inlet. The cooling water inlet valve 3 is connected to the cooling water outlet of the water cooling device 4 through a water cooling connecting pipe 5; the cooling water outlet is located at the end of the rocker arm 2 where the roller 1 is provided, and the cooling water outlet is connected to the cooling water inlet of the water cooling device 4 through a water pipe. A plurality of spray cooling blocks connected to the cooling water outlet are installed at the cooling water outlet of the rocker arm 2, which are used to spray the cooling water cooled by the spray cooling block. A plurality of temperature sensors 8 are provided, which are located at different positions on the rocker arm 2 to monitor the temperature of different areas and transmit the temperature signal to the controller. The temperature sensor 8 is located at the primary and final transmission positions of the rocker arm 2, and is used to detect the temperature at the two extreme positions of the rocker arm 2. The controller responds to the temperature signal and issues a corresponding cooling instruction. In this embodiment, the controller uses a DSP industrial computer 6, and the water cooling device 4 and the cooling water inlet valve 3 are both controlled and connected to the DSP industrial computer 6 to execute the cooling instruction issued by the controller. The DSP industrial computer 6 is installed on the traction part 7 and moves with the traction part 7.

[0056] The low-temperature cooling water after cooling enters the spiral cooling channel through the cooling water inlet and then flows out through the spray cooling block, while dust removal is performed. The spiral cooling channel increases the contact area between the cooling water and the rocker arm 2 housing, thereby increasing the contact area between the cooling water and the high-temperature lubricating oil inside the rocker arm 2 housing, thereby improving the cooling efficiency. At the same time, the temperature sensor 8 installed on the rocker arm 2 can monitor the temperature at different positions inside the rocker arm 2, collect the temperature parameters of the rocker arm 2 under different working conditions in real time, and transmit them to the DSP industrial control computer 6, so as to cool down in time, thereby realizing efficient and accurate cooling of the rocker arm 2.

[0057] Reference Figure 4, Figure 5 and Figure 6 The water cooling device 4 includes a plurality of water cooling boxes which are connected end to end in sequence through pipelines. In the present embodiment, three water cooling boxes are provided, namely a first water cooling box 10, a second water cooling box 12 and a third water cooling box 14. The first water cooling box 10 and the second water cooling box 12 are connected through a first water pipe 11, and the second water cooling box 12 and the third water cooling box 14 are connected through a second water pipe 13. Semiconductor cooling fins 15 are installed on the inner wall of the water cooling box, and a plurality of heat sinks 9 arranged in a row are integrally formed on the outer wall of the water cooling box corresponding to the position of the heating side of the semiconductor cooling fins 15, and adjacent water cooling boxes are fixedly connected through the heat sinks 9. The heat sink 9 is installed on the heating side of the semiconductor cooling fins 15 to take away the heat from the heating side of the semiconductor cooling fins 15 for cooling. Partitions are also fixed on the inner wall of the water cooling box, and the partitions separate the cross-section of each water cooling box into the following shapes: Figure 6 The U-shaped structure shown enables the cooling water to fully contact the semiconductor cooling fins 15 during the flow process, thereby ensuring the cooling effect. The heat sink 9 can not only achieve the effect of heat dissipation, but also play the role of fixed connection. The water cooling device 4 achieves a more efficient and reliable cooling effect through technical means such as multi-stage water cooling box design, the combination of semiconductor cooling fins 15 and heat sinks 9, and the fixed connection of heat sinks 9 of adjacent water cooling boxes.

[0058] The temperature sensor 8 is provided with multiple sensors, including at least two sensors, which are respectively located at the two ends of the length direction of the rocker arm 2. For example, it includes a first temperature sensor and a second temperature sensor, the first temperature sensor is located at a position of the rocker arm 2 close to the cooling water inlet, and is used to obtain a first temperature parameter. The second temperature sensor is located at a position of the rocker arm 2 close to the cooling water outlet, and is used to obtain a second temperature parameter.

[0059] Based on the first temperature parameter and the second temperature parameter acquired in real time, the following data analysis is performed:

[0060] When the first temperature parameter and / or the second temperature parameter is greater than the corresponding temperature reference value, the controller issues a first temperature reduction instruction. Therefore, when any one of the first temperature parameter or the second temperature parameter exceeds the corresponding temperature reference value, the temperature needs to be reduced.

[0061] The water cooling device 4 responds to the first temperature reduction instruction by starting the water cooling device 4 or increasing the cooling power of the water cooling device 4; for example, increasing the cooling power by 10%.

[0062] When the first temperature parameter or the second temperature parameter is greater than the corresponding temperature reference value, if the controller obtains a manually input instruction, the controller responds to the manually input instruction first and issues a second cooling instruction; wherein the manually input instruction includes a manually input preset temperature parameter and working power.

[0063] The water cooling device 4 responds to the second temperature reduction instruction and starts or adjusts the water cooling device 4 according to the preset temperature parameter and working power. For example, a preset temperature parameter (such as 50 degrees Celsius) and working power (such as increasing the cooling power by 20%) are manually input through the controller.

[0064] The controller compares the temperature with the artificial pre-set temperature parameters. When it is greater than the preset temperature parameters, the controller issues a command to start the water cooling device 4 to perform a cooling operation. The working power of the water cooling device 4, that is, the cooling effect, can be controlled by the controller through the artificial preset temperature parameters to avoid waste of resources caused by long-term high-power operation; at the same time, it can avoid problems such as high temperature of the rocker arm 2 and insufficient cooling under certain harsh working conditions. Compared with the traditional cooling method, its cooling temperature can be set arbitrarily by humans, thereby reducing the high temperature resistance requirements for the manufacturing materials of the rocker arm 2 and internal transmission components. In the extreme case of harsh working conditions in thin coal seams, if the overall size of the rocker arm 2 is small and the cutting power requirement is high, its heat generation is huge and cannot be met by traditional cooling methods. The present invention can improve the cooling efficiency by increasing the power of the water cooling device 4 to meet the cooling requirements.

[0065] In order to optimize the temperature control effect, within a set time period, based on the first temperature parameter and the second temperature parameter obtained; the first temperature parameter and the second temperature parameter are subjected to fast Fourier transform, the time domain signal is converted into a frequency domain signal, and the first frequency domain signal and the second frequency domain signal are obtained respectively; the first waveform of the first frequency domain signal is fitted, and the second waveform of the second frequency domain signal is fitted; the number of peaks in the first waveform and the number of peaks in the second waveform are obtained. Among them, the waveform fitting helps to intuitively observe and analyze the waveform characteristics of temperature changes. The number of peaks enables the system to quantify the severity of temperature changes.

[0066] And the difference between the second temperature parameter and the first temperature parameter is analyzed. The difference reflects the temperature rise of the cooling water in the rocker arm 2 and is an important indicator for evaluating the cooling effect.

[0067] If the sum of the number of peaks in the first waveform and the number of peaks in the second waveform, that is, the peak sum, is greater than the preset peak reference value; and if the difference is greater than the first preset value or less than the second preset value, the cooling power corresponding to the first cooling instruction is adjusted according to the positive correlation between the peak sum and / or the difference.

[0068] For example, within a certain period of time, the first waveform has 3 peaks, the second waveform has 4 peaks, and the peak sum is 7, which is greater than the peak reference of 5. The first temperature parameter is 65 degrees Celsius, the second temperature parameter is 50 degrees Celsius, and the difference is 15 degrees Celsius, which is greater than the preset value of 10 degrees Celsius. At this time, it is necessary to adjust the cooling power, and any one or both of the peak sum or difference are used as the influencing parameters for adjusting the cooling power. For example, for each increase in the number of peaks and / or each increase in the difference by 2 degrees Celsius, the cooling power is increased by 3%.

[0069] Through frequency domain signal analysis, waveform fitting and peak number statistics, difference analysis and intelligent adjustment, in-depth analysis and intelligent control of rocker arm 2 temperature are achieved. This not only helps to improve the cooling effect and system reliability, but also improves the operating efficiency and safety of the entire mechanical system.

[0070] In other embodiments, in order to further ensure the accuracy of temperature data monitoring, the following infrared sensors are also provided to correct the data obtained by the temperature sensor 8:

[0071] An infrared camera device is installed on the rocker arm 2 to obtain an infrared image of the rocker arm 2; the infrared camera device can capture the temperature distribution on the surface of the rocker arm 2 and provide an intuitive temperature monitoring method.

[0072] A first feature object and a second feature object are extracted from the infrared image. The first feature object corresponds to the area where the first temperature sensor is located, and the second feature object corresponds to the area corresponding to the second temperature sensor. The first feature object is matched to the corresponding first infrared temperature value; the second feature object is matched to the corresponding second infrared temperature value. This feature extraction method helps to combine the infrared image with the monitoring results of the temperature sensor 8 to achieve more comprehensive temperature monitoring.

[0073] According to the first infrared temperature value, the first temperature parameter is corrected; the corrected first temperature parameter=the first temperature parameter+a1×(the first infrared temperature value-the first reference temperature value); wherein a1 is the correction coefficient, and the first reference temperature value is a preset fixed value.

[0074] According to the second infrared temperature value, the second temperature parameter is corrected; the corrected second temperature parameter=the second temperature parameter+a2×(the second infrared temperature value-the second reference temperature value); wherein a2 is the correction coefficient, and the second reference temperature value is a preset fixed value.

[0075] For example, the first temperature parameter (initial): 25 degrees Celsius; the second temperature parameter (initial): 28 degrees Celsius; the first infrared temperature value: 26 degrees Celsius; the second infrared temperature value: 29 degrees Celsius; the first reference temperature value: 24 degrees Celsius; the second reference temperature value: 27 degrees Celsius; the correction coefficient a1: 0.5; the correction coefficient a2: 0.5.

[0076] The corrected first temperature parameter = the initial first temperature parameter + the correction amount = 25 degrees Celsius + 1 degree Celsius = 26 degrees Celsius; which is higher than the initial value of 25 degrees Celsius and closer to the first infrared temperature value of 26 degrees Celsius.

[0077] The corrected second temperature parameter = the initial second temperature parameter + the correction amount = 28 degrees Celsius + 1 degree Celsius = 29 degrees Celsius; the corrected second temperature parameter is 29 degrees Celsius, which is higher than the initial value of 28 degrees Celsius and closer to the second infrared temperature value of 29 degrees Celsius.

[0078] Since the temperature sensor 8 has a limited spatial range for collecting temperature, which is basically point sampling, it is inevitable that there will be errors in the acquisition of temperature; and when the coal mining machine is working underground, it often faces challenges such as insufficient light, large dust, and limited field of view, and the data stability and authenticity of the temperature sensor 8 are also difficult to guarantee. The infrared camera device can penetrate smoke and dust and provide clear images, which helps operators or automatic control systems to better understand the working status and surrounding environment of the coal mining machine. By introducing infrared cameras and feature object extraction technology, the system can obtain the actual temperature distribution on the surface of the rocker arm 2 and combine it with the monitoring results of the temperature sensor 8. This combination method helps to eliminate the limitations of a single monitoring method and improve the accuracy and reliability of temperature monitoring. The corrected temperature parameters are closer to the actual temperature of the surface of the rocker arm 2, which helps the controller to more accurately judge the cooling requirements of the rocker arm 2 and issue corresponding cooling instructions. This optimization method can ensure the effective circulation and heat dissipation of cooling water in the rocker arm 2, thereby improving the cooling effect and the overall performance of the system.

[0079] In this embodiment, in order to adapt to different operating conditions, the spray cooling block has a variety of structures.

[0080] Reference Figure 7 , the first structure of the spray cooling block:

[0081] The spray cooling block includes an atomizing nozzle 16, which can atomize cooling water into tiny water droplets, thereby increasing the contact area between the cooling water and the surface of the rocker arm 2, thereby improving the cooling efficiency.

[0082] When the first temperature parameter or the second temperature parameter is greater than the corresponding temperature reference value:

[0083] Method 1: Adjust the opening of the cooling water inlet valve 3 according to the positive correlation between the difference between the first temperature parameter and the corresponding temperature reference value; the greater the difference between the first temperature parameter and the corresponding temperature reference value, the greater the opening of the cooling water inlet valve 3; the smaller the difference between the first temperature parameter and the corresponding temperature reference value, the smaller the opening of the cooling water inlet valve 3. The greater the difference between the first temperature parameter and the temperature reference value, the greater the opening of the cooling water inlet valve 3, thereby allowing more cooling water to enter the spray cooling block for atomization cooling. On the contrary, if the difference between the first temperature parameter and the temperature reference value is smaller, the opening of the cooling water inlet valve 3 is smaller, so as to reduce unnecessary cooling water consumption.

[0084] Method 2: According to the positive correlation between the difference between the second temperature parameter and the corresponding temperature reference value, the opening of the cooling water inlet valve 3 is adjusted; the greater the difference between the second temperature parameter and the corresponding temperature reference value, the greater the opening of the cooling water inlet valve 3; the smaller the difference between the second temperature parameter and the corresponding temperature reference value, the smaller the opening of the cooling water inlet valve 3. Similarly, the greater the difference between the second temperature parameter and the temperature reference value, the greater the opening of the cooling water inlet valve 3, thereby allowing more cooling water to enter the spray cooling block for atomization cooling. On the contrary, if the difference between the second temperature parameter and the temperature reference value is smaller, the opening of the cooling water inlet valve 3 is smaller, so as to reduce unnecessary cooling water consumption.

[0085] For example, the corrected first temperature parameter: 26 degrees Celsius; the corrected second temperature parameter: 29 degrees Celsius; the first temperature reference value: 24 degrees Celsius; the second temperature reference value: 27 degrees Celsius; the opening range of the cooling water inlet valve 3: 0%-100%.

[0086] Then, the difference between the first temperature parameter and the corresponding temperature reference value is 2 degrees Celsius, assuming that every 1 degree Celsius difference corresponds to a 5% opening change. Then, when the difference is 2 degrees Celsius, the opening of the cooling water inlet valve 3 should be increased by 2*5%=10%. If the initial opening is 50%, the adjusted opening is 50%+10%=60%.

[0087] The difference between the second temperature parameter and the corresponding temperature reference value is 2 degrees Celsius. It is also assumed that every 1 degree Celsius difference corresponds to a 5% change in opening. Then, when the difference is 2 degrees Celsius, the opening of the cooling water inlet valve 3 should also increase by 2*5%=10%. If the opening has been adjusted to 60% according to the difference, it is now further adjusted to 60%+10%=70%.

[0088] By intelligently adjusting the opening of the cooling water inlet valve 3, the system can dynamically adjust the flow rate and atomization degree of the cooling water according to the actual temperature of the rocker arm 2, thereby improving the cooling efficiency and response speed. When the temperature of the rocker arm 2 is high, the system can quickly increase the opening of the cooling water inlet valve 3, increase the flow rate and atomization degree of the cooling water, and quickly reduce the temperature of the rocker arm 2. When the temperature of the rocker arm 2 is low, the system can reduce the opening of the cooling water inlet valve 3, reduce the flow rate and atomization degree of the cooling water, to avoid overcooling and waste of resources. Therefore, it not only helps to improve the cooling effect of the rocker arm 2 and the reliability of the system, but also improves the operating efficiency and energy-saving performance of the entire mechanical system.

[0089] Reference Figure 8 , the second structure of the spray cooling block:

[0090] The spray cooling block includes a nozzle, which includes a nozzle 17, and a shielding member 18 for shielding the nozzle 17 is installed at the nozzle 17. The shielding member 18 is elastically connected to the nozzle through an elastic member 19, and the extension direction of the shielding member 18 is consistent with the flow direction of cooling water in the nozzle. Among them, the elastic member 19 can be set as a spring. The shielding member 18 includes a protrusion 27 protruding toward the inside of the nozzle 17, and the orthographic projection of the periphery of the shielding member 18 away from the protrusion 27 at the nozzle 17 covers the nozzle 17. The cooling water is sprayed out through the gap between the nozzle 17 and the shielding member 18.

[0091] The extension and retraction direction of the shielding member 18 is consistent with the flow direction of the cooling water in the nozzle. When the pressure of the cooling water increases, the water flow impacts the shielding member 18, causing the elastic member 19 to stretch. In this way, the gap between the nozzle 17 and the shielding member 18 will become larger, allowing more cooling water to be sprayed out at a higher speed. On the contrary, when the pressure of the cooling water decreases, the elastic member 19 will retract, causing the gap to become smaller, reducing the amount of cooling water sprayed out. This structure enables the spray cooling block to dynamically adjust the amount and speed of cooling water sprayed out according to the pressure of the cooling water, thereby optimizing the cooling effect. When the temperature of the rocker arm 2 is high and a larger cooling amount is required, the system can increase the pressure of the cooling water to increase the gap and spray out more cooling water. When the temperature of the rocker arm 2 is low and a reduced cooling amount is required, the system can reduce the pressure of the cooling water to reduce the gap and reduce the amount of cooling water sprayed out.

[0092] The raised portion 27 can more effectively block and regulate the flow of cooling water, especially under low pressure conditions. The positive projection of the periphery of the shielding member 18 away from the raised portion 27 at the nozzle 17 covers the entire nozzle 17. This means that when there is no cooling water pressure or the pressure is very low, the shielding member 18 can completely or partially block the nozzle 17 to prevent the cooling water from spraying out or reduce the amount of spraying. Therefore, when the pressure of the cooling water increases, the raised portion 27 will be impacted by the water flow, causing the shielding member 18 to be displaced as a whole or partially, thereby changing the size of the gap between the nozzle 17 and the shielding member 18. This design enables the spray cooling block to more accurately adjust the amount and speed of cooling water sprayed according to the pressure of the cooling water, thereby enhancing the cooling effect. At the same time, since the shielding member 18 can completely or partially block the nozzle 17, the system can reduce or stop the spraying of cooling water when a large amount of cooling water is not needed, further improving the control accuracy and energy-saving performance, and can also reduce the entry of foreign particles into the nozzle 17.

[0093] Reference Fig. 9 , the third structure of the spray cooling block:

[0094] The spray cooling block includes a nozzle, and the nozzle includes a water outlet 20. A rotating groove 21 is provided on the outer peripheral side of the nozzle. A rotating ring 22 is rotatably connected in the rotating groove 21, and a circular shielding plate 23 for shielding the water outlet 20 is fixedly connected to the rotating ring 22. A plurality of spray holes 24 are provided on the shielding plate 23, and the plurality of spray holes 24 are unevenly distributed. The spray holes 24 are holes that are perpendicular to the shielding plate 23, and the number is unevenly distributed. Alternatively, the spray holes 24 are holes that are not perpendicular to the shielding plate 23, and the non-perpendicular holes are unevenly distributed on the circular shielding plate 23. In order to further improve the spraying effect and prevent slag dust, an elastic membrane 25 is provided at the spray hole 24, and a cross hole 26 is provided on the elastic membrane 25.

[0095] A plurality of spray holes 24 are arranged on the baffle plate 23, and these spray holes 24 are unevenly distributed, so that the cooling water can form a more complex and diverse spray pattern when spraying. Such unevenly distributed spray holes 24 help to optimize the cooling effect and ensure that the cooling water can more evenly cover the surface to be cooled. Through the design of the rotating ring 22 and the baffle plate 23, the spray cooling block can flexibly adjust the spray pattern and flow rate of the cooling water according to actual needs, thereby improving the cooling effect. In addition, the elastic membrane 25 has good elasticity and deformation ability, and can dynamically block and open the spray hole 24. The shape of the cross hole 26 enables the elastic membrane 25 to deform more easily when subjected to pressure, thereby adjusting the degree of opening of the spray hole 24. At the same time, the cross hole 26 can also ensure that the cooling water forms a more uniform and delicate spray effect when spraying.

[0096] In summary, through the design of the elastic membrane 25 and the cross hole 26, the spray cooling block can respond quickly according to the pressure of the cooling water and dynamically adjust the opening degree and spray effect of the spray hole 24. The cooling water can cover the surface to be cooled more evenly, improving the spray effect and cooling efficiency. The design of the elastic membrane 25 and the cross hole 26 also helps to enhance the stability and reliability of the system. Under different working conditions and cooling requirements, the elastic membrane 25 can adapt to different pressure conditions by deformation, ensuring the stable opening and closing of the spray hole 24, thereby avoiding waste of cooling water and system failure.

[0097] In summary, the embodiments of the present application have the following advantages:

[0098] Improve cooling efficiency: By optimizing the design of the spray cooling block, such as introducing an atomizing nozzle 16, setting an elastic shielding member 18, and opening unevenly distributed spray holes 24 on the shielding plate 23, the atomization effect and spray uniformity of the cooling water are significantly improved, thereby improving the cooling efficiency of mechanical parts such as the rocker arm 2.

[0099] Enhanced system adaptability: The spray cooling block design in this application can dynamically adjust the spray pattern and flow rate according to parameters such as the pressure and temperature of the cooling water, so that the system can better adapt to different working conditions and cooling requirements, thereby improving the overall adaptability and reliability of the system.

[0100] Improve response speed: By introducing movable parts such as the elastic member 19 and the rotating ring 22, and optimizing the design of the spray hole 24, the spray cooling block in the present application can respond more quickly to changes in cooling demand, adjust the spray mode and flow rate in time, and improve the response speed and cooling effect of the system.

[0101] Reduced cost and maintenance difficulty: The spray cooling block design in the present application adopts a relatively simple structure and easily replaceable components, such as the elastic membrane 25, the baffle plate 23, etc., which reduces the manufacturing cost and maintenance difficulty and improves the economy and practicality of the system.

[0102] Enhanced system stability: By optimizing the design of the spray cooling block, such as setting a stable rotation groove 21 and a rotation ring 22 connection, and using a durable elastic membrane 25 material, the stability and reliability of the system are enhanced, and the failure rate and maintenance requirements are reduced.

[0103] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A rocker arm cooling system, characterized in that: The invention comprises a water cooling device (4), a cooling channel spirally arranged in the rocker arm (2) structure, a temperature sensor (8) arranged on the rocker arm (2), and a controller; the rocker arm (2) is provided with a cooling water inlet and a cooling water outlet connected to the cooling channel, the cooling water inlet is provided with a cooling water inlet valve (3); the cooling water inlet valve (3) is connected to the cooling water outlet of the water cooling device (4) through a water pipe; the cooling water outlet is provided with one end of a roller (1) near the rocker arm (2); the cooling water outlet is connected to the cooling water inlet of the water cooling device (4) through a water pipe; a plurality of spray cooling blocks connected to the cooling water outlet are provided on the rocker arm (2) at the cooling water outlet, and are used to spray out the cooling water cooled by the spray cooling blocks; The temperature sensor (8) is electrically connected to the controller, and is used to sense the temperature of the rocker arm (2) and transmit a temperature signal to the controller; the controller responds to the temperature signal and issues a corresponding temperature reduction instruction; The water cooling device (4) and the cooling water inlet valve (3) are both controllably connected to the controller and are used to execute a temperature reduction instruction issued by the controller; The temperature sensors (8) are provided in plurality, including a first temperature sensor and a second temperature sensor, wherein the first temperature sensor is located on the rocker arm (2) near a cooling water inlet and is used to obtain a first temperature parameter; and the second temperature sensor is located on the rocker arm (2) near a cooling water outlet and is used to obtain a second temperature parameter. Based on a first temperature parameter and a second temperature parameter acquired in real time; When the first temperature parameter and / or the second temperature parameter is greater than the corresponding temperature reference value, the controller issues a first temperature reduction instruction; The water cooling device (4) starts the water cooling device (4) or increases the cooling power of the water cooling device (4) in response to the first temperature reduction instruction; When the first temperature parameter or the second temperature parameter is greater than the corresponding temperature reference value, if the controller obtains a manual input instruction, the controller responds to the manual input instruction first and issues a second temperature reduction instruction; wherein the manual input instruction includes a manually input preset temperature parameter and working power; The water cooling device (4) responds to the second temperature reduction instruction and starts or adjusts the water cooling device (4) according to preset temperature parameters and working power; Within a set time period, based on the acquired first temperature parameter and second temperature parameter; Performing a fast Fourier transform on the first temperature parameter and the second temperature parameter to convert the time domain signal into a frequency domain signal; obtaining a first frequency domain signal and a second frequency domain signal respectively; fitting a first waveform of the first frequency domain signal and a second waveform of the second frequency domain signal; obtaining the number of peaks in the first waveform and the number of peaks in the second waveform; and analyzing in combination with the difference between the second temperature parameter and the first temperature parameter; If the sum of the number of peaks in the first waveform and the number of peaks in the second waveform, that is, the peak sum, is greater than the preset peak reference value; and if the difference is greater than the first preset value or less than the second preset value, the cooling power corresponding to the first cooling instruction is adjusted according to the positive correlation between the peak sum and / or the difference.

2. The rocker arm cooling system according to claim 1, characterized in that: The water cooling device (4) comprises a plurality of water cooling boxes which are connected end to end in sequence through pipelines, the inner wall of the water cooling box is provided with a semiconductor cooling fin (15), the outer wall of the water cooling box is provided with a heat sink (9) at a position corresponding to the semiconductor cooling fin (15), and the heat sink (9) located between adjacent water cooling boxes is fixedly connected to the adjacent water cooling boxes.

3. The rocker arm cooling system according to claim 1, characterized in that: The rocker arm (2) is provided with an infrared camera device for obtaining an infrared image of the rocker arm (2); Extracting a first characteristic object and a second characteristic object from the infrared imaging image, the first characteristic object corresponding to the area where the first temperature sensor is located, and the second characteristic object corresponding to the area corresponding to the second temperature sensor; matching a corresponding first infrared temperature value according to the first characteristic object; The second feature object matches a corresponding second infrared temperature value; According to the first infrared temperature value, the first temperature parameter is corrected; the corrected first temperature parameter = the first temperature parameter + a1 × (the first infrared temperature value - the first reference temperature value); wherein a1 is the correction coefficient, and the first reference temperature value is a preset fixed value; According to the second infrared temperature value, the second temperature parameter is corrected; the corrected second temperature parameter=the second temperature parameter+a2×(the second infrared temperature value-the second reference temperature value); wherein a2 is the correction coefficient, and the second reference temperature value is a preset fixed value.

4. The rocker arm cooling system according to claim 1, characterized in that: The spray cooling block comprises an atomizing nozzle (16), when the first temperature parameter or the second temperature parameter is greater than the corresponding temperature reference value: The opening of the cooling water inlet valve (3) is adjusted according to the positive correlation between the difference between the first temperature parameter and the corresponding temperature reference value; the greater the difference between the first temperature parameter and the corresponding temperature reference value, the greater the opening of the cooling water inlet valve (3); the smaller the difference between the first temperature parameter and the corresponding temperature reference value, the smaller the opening of the cooling water inlet valve (3); Alternatively, the opening of the cooling water inlet valve (3) is adjusted according to the positive correlation between the difference between the second temperature parameter and the corresponding temperature reference value; the greater the difference between the second temperature parameter and the corresponding temperature reference value, the greater the opening of the cooling water inlet valve (3); the smaller the difference between the second temperature parameter and the corresponding temperature reference value, the smaller the opening of the cooling water inlet valve (3).

5. The rocker arm cooling system according to claim 1, characterized in that: The spray cooling block comprises a spray head, wherein a shielding member (18) for shielding the spray head (17) is arranged at the spray head nozzle (17), the shielding member (18) is elastically connected to the spray head via an elastic member (19), and the extension direction of the shielding member (18) is consistent with the flow direction of cooling water in the spray head; the cooling water is sprayed out through the gap between the spray head (17) and the shielding member (18).

6. The rocker arm cooling system according to claim 5, characterized in that: The shielding member (18) comprises a protruding portion (27) protruding toward the inside of the spout (17), and the orthographic projection of the periphery of the shielding member (18) away from the protruding portion (27) at the spout (17) covers the spout (17).

7. The rocker arm cooling system according to claim 1, characterized in that: The spray cooling block comprises a nozzle, the nozzle comprises a water outlet (20), a rotating groove (21) is arranged on the outer peripheral side of the nozzle, a rotating ring (22) is rotatably connected in the rotating groove (21), a shielding plate (23) for shielding the water outlet (20) is fixedly connected to the rotating ring (22), a plurality of spray holes (24) are arranged on the shielding plate (23), and the plurality of spray holes (24) are unevenly distributed.

8. The rocker arm cooling system according to claim 7, characterized in that: An elastic membrane (25) is provided at the injection hole (24), and a cross hole (26) is opened on the elastic membrane (25).

Images