Horizontal heat dissipation system of fracturing truck

Abstract

The invention relates to the technical field of fracturing equipment, in particular to a fracturing truck horizontal cooling system which comprises a radiator unit, a cooling fan, a detection unit, an analysis unit and a control unit. The radiator unit is divided into two layers of cooling modules, the detection unit is used for detecting the circulating temperature, the working number and the output displacement, and the analysis unit is used for judging the distribution condition of the cooling modules needing heat dissipation according to the working number, calculating the maximum temperature difference value according to the weight and the scoring standard coefficient, and adjusting the actual rotating speed of a cooling fan. And according to the temperature difference value judgment result, the heat dissipation area is adjusted, and the cooling degree and the heat dissipation allowance of each cooling module are judged. The control unit is used for adjusting the actual rotating speed and the initial minimum rotating speed of the cooling fan and controlling the working state of the thermostat and the opening and closing of the fixed switch; by adaptively adjusting the heat dissipation area of the heat dissipation system, the heat dissipation flexibility and adaptability of the fracturing truck are improved.

Description

Technical Field

[0001] The invention relates to the technical field of fracturing equipment, and in particular to a horizontal heat dissipation system for a fracturing vehicle. Background Art

[0002] Hydraulic fracturing trucks can replace traditional transmission boxes and drive shafts by combining the power of multiple engines according to working conditions, and flexibly adapt to the needs of high-pressure and large-displacement fracturing operations. Due to the harsh working environment of hydraulic fracturing trucks and the changing fracturing conditions, the fracturing trucks often need to be shut down due to excessive oil temperature, which seriously affects the reliability and service life of the fracturing trucks, thereby reducing the production efficiency of shale gas and gradually losing market vitality.

[0003] Chinese Patent Publication No.: CN108644001A discloses a hydraulic motor driven intelligent heat dissipation system and its heat dissipation method, the system includes a composite radiator, a radiator tail frame and a hydraulic system; the method includes the following steps: (1) respectively setting the response relationship between the fan speed and the gearbox oil temperature signal and the engine coolant temperature signal; (2) real-time acquisition of the gearbox oil temperature signal and the engine coolant temperature signal; (3) when the gearbox oil temperature and the engine coolant temperature are both less than the set opening value, the fan rotates at the initial speed n; when one of the gearbox oil temperature and the engine coolant temperature exceeds the set opening value, the fan rotates at the fan speed corresponding to the temperature parameter exceeding the set opening value; when the gearbox oil temperature and the engine coolant temperature both exceed the set opening value, the fan rotates at the fan speed corresponding to the temperature parameter exceeding the set opening value; when the gearbox oil temperature and the engine coolant temperature both exceed the set opening value, the fan speeds corresponding to the two temperature parameters are compared, and the fan rotates at the larger fan speed. It can be seen that the hydraulic motor driven intelligent heat dissipation system and its heat dissipation method have the following problems:

[0004] The method of adjusting the fan speed has poor accuracy, and the cooling degree of the device varies greatly when the internal device of the fracturing truck is cooled. Summary of the invention

[0005] To this end, the present invention provides a horizontal heat dissipation system for a fracturing truck, which is used to overcome the problem that the method for adjusting the fan speed in the prior art has poor accuracy and the cooling degree of the device varies greatly when dissipating heat from the internal device of the fracturing truck.

[0006] To achieve the above object, the present invention provides a horizontal heat dissipation system for a fracturing truck, comprising:

[0007] The radiator unit is divided into two layers. The first layer of the radiator unit includes an engine fuel cooling module, a hydraulic oil cooling module, a pressure pump power end cooling module and a transmission case cooling module; the second layer of the radiator unit includes an engine steel jacket water cooling module and an engine intercooler cooling module;

[0008] A cooling fan, which blows cooling air into the radiator unit by rotating, wherein the cooling fan is connected to a hydraulic motor;

[0009] A detection unit, which is connected to the analysis unit and includes a temperature sensor, a displacement sensor and a counter, and is used to detect the circulation temperature of the cooling medium, the working number of the thermostat and the output displacement of the fracturing vehicle, and transmit the data to the analysis unit;

[0010] An analysis unit connected to the control unit, wherein the analysis unit is provided with weights of each cooling module, a temperature difference evaluation value, a thermostat operating temperature range, a first scoring standard coefficient of the first layer of the radiator unit, and a second scoring standard coefficient of the second layer of the radiator unit;

[0011] The analysis unit is used to adjust the working state of the thermostat according to the working temperature range of the thermostat and the circulation temperature of the cooling medium, judge the distribution of cooling modules that need heat dissipation according to the working number of the thermostat, calculate the maximum temperature difference according to the temperature difference and weight between the circulation temperature and the corresponding minimum temperature and the scoring standard coefficient, adjust the actual speed of the cooling fan according to the maximum temperature difference, adjust the heat dissipation area according to the temperature difference judgment result, and judge the cooling degree and heat dissipation margin of each cooling module.

[0012] The control unit is used to adjust the actual speed and the initial minimum speed of the cooling fan according to the instructions of the analysis module, and control the working state of the thermostat and the opening and closing of the fixed switch.

[0013] Furthermore, the engine fuel cooling module, hydraulic oil cooling module, pressure pump power end cooling module and transmission box cooling module in the first layer of the radiator unit are arranged in parallel on the bottom layer of the radiator unit;

[0014] The engine steel jacket water cooling module and the engine intercooler cooling module in the second layer of the radiator unit are arranged in parallel on the upper layer of the radiator unit;

[0015] The cooling fan and the hydraulic motor are arranged at the bottom of the radiator unit;

[0016] A heat dissipation pipeline loop is arranged inside the cooling module, the pipeline loop inside the engine fuel cooling module is connected to the pipeline loop inside the hydraulic oil cooling module; the pipeline loop inside the pressure pump power end cooling module is connected to the pipeline loop inside the transmission box cooling module;

[0017] A telescopic section that can be telescopically moved and a telescopic spring fixed to the pipeline wall are arranged at the pipeline loop connection, the telescopic section is connected to the telescopic spring, a fixed switch is arranged inside the telescopic section, and the fixed switch can fix the telescopic end at the initial position.

[0018] Furthermore, the detection unit detects the circulation temperature of the cooling medium circulating in the pipeline loop in the cooling module.

[0019] If the circulation temperature exceeds the operating temperature range of the thermostat, the analysis unit determines that the circulation temperature of the cooling medium in the corresponding module loop exceeds the normal range, and the analysis unit sends a signal to the control unit to adjust the thermostat to the first working state;

[0020] If the circulation temperature does not exceed the operating temperature range of the thermostat, the analysis unit determines that the circulation temperature of the cooling medium in the corresponding module loop does not exceed the normal range, and the analysis unit sends a signal to the control unit to adjust the thermostat to the second working state;

[0021] Wherein, the cooling medium includes fuel oil, lubricating oil, hydraulic oil and cooling water.

[0022] Furthermore, when any thermostat is in the second working state, the thermostat is closed, the cooling medium corresponding to the cooling module of the first layer of the radiator unit does not flow into the radiator unit, and the cooling medium circulates in the corresponding device and pipeline loop; the cooling medium in the corresponding cooling module of the second layer of the radiator unit circulates in the radiator unit through the bypass pipeline, and the analysis unit determines the cooling degree of each cooling module;

[0023] When any thermostat is in the first working state, the thermostat is opened, and the cooling medium of the cooling module corresponding to the thermostat of the first layer of the radiator unit is passed into the cooling module and cooled inside the circulation pipeline. The cooling medium in the corresponding cooling module of the second layer of the radiator unit cools the corresponding device through the circulation pipeline. The analysis unit adjusts the fan speed and working state according to the working number of the thermostat.

[0024] Furthermore, the detection unit detects the number of thermostats in the cooling module that are in the first working state.

[0025] If the number of operations is not one, the analysis unit determines that there are a number of cooling modules that need heat dissipation, and determines the distribution of the cooling modules that need heat dissipation according to the working state of the thermostat;

[0026] If the number of jobs is equal to one, the analysis unit determines that there is only one cooling module that needs to dissipate heat, and calculates the temperature difference between the circulation temperature of the cooling medium detected by the detection unit and the minimum value of the working temperature range of the thermostat, and increases the actual speed of the cooling fan according to the ratio of the temperature difference to the temperature difference evaluation value;

[0027] Specifically, the temperature difference evaluation value is a preset value set according to historical data of the cycle temperature and the corresponding actual rotation speed.

[0028] Further, when the working number is not one, if the thermostat in the first working state is some of the third thermostat, the fourth thermostat, the fifth thermostat and the sixth thermostat, or the thermostat in the first working state is the first thermostat and the second thermostat, the analysis unit determines that the cooling modules that need heat dissipation are in the same layer;

[0029] If the thermostats in the first working state are some of the third thermostat, the fourth thermostat, the fifth thermostat and the sixth thermostat and some of the first thermostat and the second thermostat, the analyzing unit determines that the cooling modules that need heat dissipation are not in the same layer.

[0030] Furthermore, when the cooling modules that need to dissipate heat are in the same layer, the analysis unit calculates the temperature difference between the circulation temperature of several cooling media and the minimum value of the working temperature range of the corresponding thermostat, and increases the actual speed of the cooling fan according to the ratio of the maximum value of the temperature difference to the corresponding temperature difference evaluation value;

[0031] The maximum temperature difference is equal to the maximum value of the product of the temperature difference and the corresponding cooling module weight;

[0032] When the cooling modules that need to dissipate heat are not in the same layer, the cooling air of the cooling fan first flows through the first layer of the radiator unit and then flows through the second layer of the radiator unit. The analysis unit calculates the temperature difference between the circulation temperature of several cooling media and the minimum value of the working temperature range of the corresponding thermostat, and increases the actual speed of the cooling fan according to the ratio of the maximum value of the temperature difference to the corresponding temperature difference evaluation value.

[0033] The maximum value of the temperature difference is equal to the maximum value of the product of the temperature difference, the corresponding cooling module weight and the scoring standard of the layer number;

[0034] The scoring standard is equal to the product of the first scoring standard coefficient and the second scoring standard coefficient and the sum of the weights of the cooling modules in the same layer;

[0035] The weight of the engine fuel cooling module is greater than that of the transmission box cooling module, greater than that of the pressure pump power end cooling module, and greater than that of the hydraulic oil cooling module; the first scoring standard coefficient is less than the second scoring standard coefficient.

[0036] Furthermore, the analysis unit compares the temperature difference with the corresponding difference evaluation value.

[0037] If the temperature difference is less than or equal to the corresponding difference evaluation value, the analysis unit determines that the temperature difference is within the normal temperature difference range;

[0038] If the temperature difference is greater than the corresponding difference evaluation value, the analysis unit determines that the temperature difference exceeds the normal temperature difference range, and the control unit opens the fixed switch inside the telescopic section.

[0039] Further, after the cooling medium is passed into the cooling module, the detection unit detects the actual maximum value and the actual minimum value of the circulation temperature;

[0040] The analysis unit calculates the heat generation according to the actual difference between the actual maximum value and the temperature minimum value of the thermostat working temperature range, calculates the heat dissipation according to the actual difference between the actual maximum value and the actual minimum value, and calculates the heat dissipation margin of the cooling module according to the heat generation and the heat dissipation, wherein the heat dissipation margin is equal to the heat dissipation minus the heat generation,

[0041] If the heat dissipation margin is greater than or equal to the standard value, the analysis unit determines that the heat dissipation margin of the cooling module meets the standard;

[0042] If the heat dissipation margin is less than the standard value, the analysis unit determines that the heat dissipation margin of the cooling module does not meet the standard and there is a risk of overheating, and increases the initial minimum speed of the cooling fan according to the ratio of the standard value to the heat dissipation margin.

[0043] Furthermore, when the thermostat is in the second working state, the detection unit detects the output displacement of the fracturing truck, and the analysis unit compares the output displacement with the critical displacement.

[0044] If the output displacement of the fracturing truck is less than the critical displacement, the analysis unit determines that the fuel is fully burned;

[0045] If the output displacement of the fracturing truck is greater than or equal to the critical displacement, the analysis unit determines that the fuel combustion is insufficient, and the analysis unit increases the minimum temperature value in the working temperature range of the third thermostat in the engine fuel cooling module;

[0046] The critical displacement is a preset value set by the temporary displacement data of the fracturing truck.

[0047] Compared with the prior art, the beneficial effect of the present invention lies in that the present invention sets different weights and scoring standard coefficients for the influence of devices cooled by different cooling modules on the work of the fracturing truck, adopts different cooling fan speed adjustment methods according to the specific heat dissipation conditions of the cooling modules that need to dissipate heat, calculates the maximum value of the temperature difference according to the weight of the cooling modules when the cooling modules that need to dissipate heat are on the same layer, and calculates the maximum value of the temperature difference according to the scoring standard and weight of the number of layers of the cooling modules when the cooling modules that need to dissipate heat are on two layers, further increasing the accuracy and adaptability of heat dissipation for the fracturing truck, avoiding the situation where some devices in the fracturing truck have cooling degrees that meet the standards while others do not, alleviating the unevenness of the heat dissipation degree, and reducing the influence of different heat dissipation degrees on the operation of the fracturing truck.

[0048] Furthermore, when the number of working thermostats is not one, two situations may occur: the cooling modules that need heat dissipation are on the same layer of the first layer or the second layer, and the cooling modules that need heat dissipation are located on two layers of the heat dissipation unit respectively. The distribution of the cooling modules that need heat dissipation is judged according to the working status of the corresponding thermostat, and the actual speed of the cooling fan is adjusted, thereby increasing the accuracy and adaptability of heat dissipation for the fracturing truck.

[0049] Furthermore, the analysis unit determines the circulation temperature of the cooling medium according to the temperature difference, and opens the fixed switch inside the telescopic section when the circulation temperature exceeds the normal temperature range. The telescopic section moves toward the adjacent cooling module under the pressure exerted by the cooling medium, and after the cooling medium flows out of the pipeline loop of the cooling module, the telescopic section moves back to the initial position under the action of the telescopic spring; by moving the telescopic section, the heat dissipation area of ​​the cooling module is increased, the heat dissipation capacity and heat dissipation efficiency of the cooling medium are increased, and the adaptability and flexibility of controlling and adjusting the cooling degree are increased.

[0050] Furthermore, excessive cooling of the engine will cause the cylinder temperature to be too low, the atomization degree of the combustible mixture to deteriorate, and the combustion to be incomplete, resulting in a decrease in engine power. The fuel that is not completely vaporized due to the low temperature increases the displacement of the fracturing truck, and the exhaust emission pollution is serious. The present invention quantifies the cooling capacity of the cooling module in the radiator unit by the output displacement of the fracturing truck, increases the working temperature range of the thermostat according to the cooling degree, reduces the pollution caused by the exhaust emission to the environment, increases the applicability of controlling and adjusting the cooling degree, avoids excessive cooling degree causing incomplete fuel combustion, and avoids the fuel that is not completely vaporized increases the displacement of the fracturing truck.

[0051] Furthermore, the heat dissipation margin refers to the additional heat dissipation capacity that the heat dissipation system can provide under normal working conditions. Due to the material, heat dissipation area and properties, the heat dissipation capacity of each module is different. The analysis module calculates the heat dissipation margin of each cooling module based on the heat generation and heat dissipation. The reliability and safety of the heat dissipation system and its adaptability under different working conditions are evaluated based on the comparison results between the heat dissipation margin and the standard value. The heat dissipation of each cooling module is increased by increasing the initial minimum speed of the cooling fan, thereby increasing the heat dissipation margin of each cooling module, improving the reliability, safety and adaptability of the heat dissipation system, and reducing the risk of overheating of the fracturing vehicle under different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 This is a schematic diagram of unit connections of a horizontal heat dissipation system for a fracturing truck according to an embodiment of the present invention;

[0053] Figure 2 This is a schematic diagram of the connection between the fracturing vehicle and the horizontal heat dissipation system in an embodiment of the present invention;

[0054] Figure 3is a schematic structural diagram of a radiator unit in an embodiment of the present invention;

[0055] Figure 4 A schematic cross-sectional view of a pipe loop connection of a cooling module in an embodiment of the present invention;

[0056] In the figure: 1-first layer of radiator unit, 2-second layer of radiator unit, 11-engine fuel cooling module, 12-hydraulic oil cooling module, 13-pressure pump power end cooling module, 14-transmission case cooling module, 21-engine steel jacket water cooling module, 22-engine intercooler cooling module, 3-cooling fan, 4-hydraulic motor, 5-engine, 6-water pump, 7-intercooler, 8-water tank, 9-pipeline loop, 91-telescopic section, 92-telescopic spring. DETAILED DESCRIPTION

[0057] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0058] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0059] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0060] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] See also Figure 1-Figure 4 As shown, Figure 1 This is a schematic diagram of unit connections of a horizontal heat dissipation system for a fracturing truck according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the connection between the fracturing vehicle and the horizontal heat dissipation system in an embodiment of the present invention;

[0062] Figure 3 is a schematic structural diagram of a radiator unit in an embodiment of the present invention; Figure 4 A schematic cross-sectional view of a pipe loop connection of a cooling module in an embodiment of the present invention.

[0063] The present invention provides a horizontal heat dissipation system for a fracturing vehicle, comprising:

[0064] The radiator unit is divided into two layers. The first layer 1 of the radiator unit includes an engine fuel cooling module 11, a hydraulic oil cooling module 12, a pressure pump power end cooling module 13 and a transmission box cooling module 14; the second layer 2 of the radiator unit includes an engine steel jacket water cooling module 21 and an engine intercooler cooling module 22;

[0065] The engine steel jacket cooling module is used to cool the main part of the steel jacket of the engine by cooling water. The cooling medium circulating in the pipeline loop 9 in the engine steel jacket water cooling module 21 is cooling water. The engine steel jacket cooling module is provided with a first thermostat;

[0066] The engine intercooler cooling module 22 is used to cool the intercooler of the engine by cooling water. The cooling medium circulating in the pipeline loop 9 in the engine intercooler cooling module 22 is cooling water. The engine intercooler cooling module 22 is provided with a second thermostat.

[0067] The engine fuel cooling module 11 is connected to the engine fuel pipeline and is used to dissipate the heat of the fuel flowing through the radiator to ensure that the fuel works at a suitable temperature. The cooling medium circulating in the pipeline loop 9 in the engine fuel cooling module 11 is fuel. The engine fuel cooling module 11 is provided with a third thermostat;

[0068] A hydraulic oil cooling module 12, which is connected to the hydraulic oil pipeline of the hydraulic system, is used to dissipate heat from the hydraulic oil flowing through the radiator and cool the hydraulic system. The cooling medium circulating in the pipeline loop 9 in the hydraulic oil cooling module 12 is hydraulic oil, and a fourth thermostat is provided in the hydraulic oil cooling module 12;

[0069] The pressure pump power end cooling module 13 is connected to the pressure pump power end lubricating oil pipeline and is used to dissipate the heat of the pressure pump lubricating oil flowing through the radiator and cool the power end of the fracturing pump. The cooling medium circulating in the pipeline loop 9 in the pressure pump power end cooling module 13 is lubricating oil. A fifth thermostat is provided in the pressure pump power end cooling module 13.

[0070] The transmission case cooling module 14 is connected to the transmission shaft lubricating oil pipeline in the transmission case and is used to dissipate the heat of the transmission shaft lubricating oil flowing through the radiator. The cooling medium circulating in the pipeline loop 9 in the transmission case cooling module 14 is lubricating oil. The transmission case cooling module 14 is provided with a sixth thermostat;

[0071] A cooling fan 3, which blows cooling air into the radiator unit by rotating, and the cooling fan 3 is connected to a hydraulic motor 4;

[0072] A detection unit, which is connected to the analysis unit and includes a temperature sensor, a displacement sensor and a counter, and is used to detect the circulation temperature of the cooling medium, the working number of the thermostat and the output displacement of the fracturing vehicle, and transmit the data to the analysis unit;

[0073] An analysis unit connected to the control unit, wherein the analysis unit is provided with weights of each cooling module, a temperature difference evaluation value, a thermostat operating temperature range, and a first scoring standard coefficient of the first layer 1 of the radiator unit and a second scoring standard coefficient of the second layer 2 of the radiator unit;

[0074] The analysis unit is used to adjust the working state of the thermostat according to the working temperature range of the thermostat and the circulation temperature of the cooling medium, judge the distribution of cooling modules that need heat dissipation according to the working number of the thermostat, calculate the maximum temperature difference according to the temperature difference and weight between the circulation temperature and the corresponding minimum temperature and the scoring standard coefficient, adjust the actual speed of the cooling fan 3 according to the maximum temperature difference, adjust the heat dissipation area according to the temperature difference judgment result, and judge the cooling degree and heat dissipation margin of each cooling module.

[0075] The control unit is used to adjust the actual speed and the initial minimum speed of the cooling fan 3 according to the instructions of the analysis module, and control the working state of the thermostat and the opening and closing of the fixed switch.

[0076] The engine and radiator are started through the hydraulic system, and the power generated by the engine is transmitted to the pressure pump through the transmission shaft of the transmission box;

[0077] The engine fuel cooling module 11, the hydraulic oil cooling module 12, the pressure pump power end cooling module 13 and the transmission box cooling module 14 in the first layer 1 of the radiator unit are arranged in parallel on the bottom layer of the radiator unit;

[0078] A pipeline loop 9 is provided inside the cooling module for allowing the cooling medium to flow in when the thermostat is opened. The pipeline loop 9 inside the engine fuel cooling module 11 is connected to the pipeline loop 9 inside the hydraulic oil cooling module 12; the pipeline loop 9 inside the pressure pump power end cooling module 13 is connected to the pipeline loop 9 inside the transmission box cooling module 14;

[0079] A telescopic section 91 that can be telescopically moved and a telescopic spring 92 fixed to the pipe wall are provided at the connection of the pipe loop 9. The telescopic section 91 is connected to the telescopic spring 92. A fixed switch is provided inside the telescopic section 91. The fixed switch can fix the telescopic end at the initial position.

[0080] Specifically, the telescopic section 91 moves when subjected to an external force and drives the telescopic spring 92 to expand and contract to generate elastic deformation. When the external force is eliminated, the telescopic section 91 moves back to the initial position under the action of the telescopic spring 92 that generates elastic deformation.

[0081] The elastic coefficient of the telescopic spring 92 can be adjusted. It can be understood that the elastic coefficient of the spring and the size of the external force determine the maximum moving distance of the telescopic section 91.

[0082] The engine steel jacket water cooling module 21 and the engine intercooler cooling module 22 in the second layer 2 of the radiator unit are arranged in parallel on the upper layer of the radiator unit;

[0083] The cooling fan 3 and the hydraulic motor 4 are arranged at the bottom of the radiator unit;

[0084] Each cooling module is equipped with a thermostat with different preset working temperature ranges. The working temperature range of the thermostat consists of a maximum temperature and a minimum temperature.

[0085] In this embodiment, the preset minimum temperature value of the first thermostat is 77°C, the preset minimum temperature value of the second thermostat is 32°C, the preset minimum temperature value of the third thermostat is 40°C, the preset minimum temperature value of the fourth thermostat is 43°C, the preset minimum temperature value of the fifth thermostat is 71°C, and the preset minimum temperature value of the sixth thermostat is 93°C.

[0086] The thermostat can control the working state, cooling state and circulation state of the cooling module according to the working temperature range set by the thermostat, and is used to control the cooling medium to flow through the heat dissipation system for cooling.

[0087] After the hydraulic system of the fracturing truck starts the heat dissipation system, the cooling fan 3 rotates at the initial minimum speed;

[0088] The detection unit detects the circulation temperature of the cooling medium circulating in the pipeline loop 9 in the cooling module;

[0089] In this embodiment, the cooling medium includes fuel oil, lubricating oil, hydraulic oil and cooling water;

[0090] If the circulation temperature exceeds the operating temperature range of the thermostat, the analysis unit determines that the circulation temperature of the cooling medium in the corresponding module loop exceeds the normal range, and the analysis unit sends a signal to the control unit to adjust the thermostat to the first working state;

[0091] If the circulation temperature does not exceed the operating temperature range of the thermostat, the analysis unit determines that the circulation temperature of the cooling medium in the corresponding module loop does not exceed the normal range, and the analysis unit sends a signal to the control unit to adjust the thermostat to the second working state.

[0092] When any thermostat is in the second working state, the thermostat is closed, the cooling medium corresponding to the cooling module of the first layer 1 of the radiator unit does not flow into the radiator unit, and the cooling medium circulates in the corresponding device and pipeline loop 9; the cooling medium in the corresponding cooling module of the second layer 2 of the radiator unit circulates in the radiator unit through the bypass pipeline, and the analysis unit determines the cooling degree of each cooling module;

[0093] When any thermostat is in the first working state, the thermostat is opened, and the cooling medium of the cooling module corresponding to the thermostat of the first layer 1 of the radiator unit is passed into the cooling module and cooled inside the circulation pipeline. The cooling medium in the corresponding cooling module of the second layer 2 of the radiator unit cools the corresponding device through the circulation pipeline. The analysis unit adjusts the fan speed and working state according to the working number of the thermostat.

[0094] The detection unit detects the number of thermostats in the first working state in the cooling module.

[0095] If the number of operations is not one, the analysis unit determines that there are a number of cooling modules that need heat dissipation, and determines the distribution of the cooling modules that need heat dissipation according to the working states of the first thermostat and the sixth thermostat;

[0096] If the number of jobs is equal to one, the analysis unit determines that there is only one cooling module that needs heat dissipation, and calculates the temperature difference between the circulation temperature of the cooling medium detected by the detection unit and the minimum value of the working temperature range of the thermostat, and increases the actual speed of the cooling fan 3 according to the ratio of the temperature difference to the temperature difference evaluation value;

[0097] Specifically, the temperature difference evaluation value is a preset value set according to historical data of the cycle temperature and the corresponding actual rotation speed.

[0098] Specifically, when the number of working thermostats is not one, two situations may occur: the cooling modules that need heat dissipation are on the same layer of the first layer or the second layer; the cooling modules that need heat dissipation are located on two layers of the heat dissipation unit respectively. The distribution of the cooling modules that need heat dissipation is judged according to the working status of the corresponding thermostat, and the actual speed of the cooling fan 3 is adjusted, thereby increasing the accuracy and adaptability of heat dissipation for the fracturing truck.

[0099] When the working number is not one, if the thermostat in the first working state is some of the third thermostat, the fourth thermostat, the fifth thermostat and the sixth thermostat, or the thermostat in the first working state is the first thermostat and the second thermostat, the analysis unit determines that the cooling modules that need heat dissipation are in the same layer;

[0100] If the thermostat in the first working state is some of the third thermostat, the fourth thermostat, the fifth thermostat and the sixth thermostat and some of the first thermostat and the second thermostat, the analysis unit determines that the cooling modules that need to dissipate heat are not in the same layer;

[0101] When the cooling modules that need to dissipate heat are in the same layer, the analysis unit calculates the temperature difference between the circulation temperature of several cooling media and the minimum value of the working temperature range of the corresponding thermostat, and increases the actual speed of the cooling fan 3 according to the ratio of the maximum value of the temperature difference to the corresponding temperature difference evaluation value;

[0102] The maximum temperature difference is equal to the maximum value of the product of the temperature difference and the corresponding cooling module weight.

[0103] When the cooling modules that need to dissipate heat are not in the same layer, the cooling air of the cooling fan 3 first flows through the first layer 1 of the radiator unit and then flows through the second layer 2 of the radiator unit. The analysis unit calculates the temperature difference between the circulation temperature of several cooling media and the minimum value of the working temperature range of the corresponding thermostat, and increases the actual speed of the cooling fan 3 according to the ratio of the maximum value of the temperature difference to the corresponding temperature difference evaluation value.

[0104] The maximum temperature difference value is equal to the maximum value of the product of the temperature difference value, the corresponding cooling module weight and the scoring standard of the layer number.

[0105] Specifically, the weight of the engine fuel cooling module 11 is greater than the transmission cooling module 14, greater than the pressure pump power end cooling module 13, greater than the hydraulic oil cooling module 12, greater than the engine intercooler cooling module 22, and greater than the engine steel jacket cooling module; the first scoring standard coefficient is greater than the second scoring standard coefficient.

[0106] Specifically, the scoring standard is equal to the product of the scoring standard coefficient of each layer and the sum of the weights of the cooling modules in the same layer.

[0107] Specifically, the present invention sets different weights and scoring standard coefficients for the influence of devices cooled by different cooling modules on the work of the fracturing truck, adopts different speed adjustment methods of the cooling fan 3 according to the specific heat dissipation conditions of the cooling modules that need to dissipate heat, calculates the maximum value of the temperature difference according to the weight of the cooling modules when the cooling modules that need to dissipate heat are on the same layer, and calculates the maximum value of the temperature difference according to the scoring standard and weight of the number of layers of the cooling modules when the cooling modules that need to dissipate heat are on two layers, thereby further increasing the accuracy and adaptability of heat dissipation for the fracturing truck, avoiding the situation where some devices in the fracturing truck have cooling degrees that meet the standards while others do not, alleviating the unevenness of the heat dissipation degree, and reducing the influence of different heat dissipation degrees on the operation of the fracturing truck.

[0108] The analysis unit compares the temperature difference with the corresponding difference evaluation value.

[0109] If the temperature difference is less than or equal to the corresponding difference evaluation value, the analysis unit determines that the temperature difference is within the normal temperature difference range and the circulation temperature of the cooling medium is moderate;

[0110] If the temperature difference is greater than the corresponding difference evaluation value, the analysis unit determines that the temperature difference exceeds the normal temperature difference range, the difference between the circulation temperature of the cooling medium and the operating temperature range of the corresponding thermostat is large, and the control unit opens the fixed switch inside the telescopic section 91.

[0111] Specifically, the analysis unit determines the circulation temperature of the cooling medium according to the temperature difference, and opens the fixed switch inside the telescopic section 91 when the circulation temperature exceeds the normal temperature range. The telescopic section 91 moves toward the adjacent cooling module under the pressure exerted by the cooling medium. After the cooling medium flows out of the pipeline loop 9 of the cooling module, the telescopic section 91 moves back to the initial position under the action of the telescopic spring 92. By moving the telescopic section 91, the heat dissipation area of ​​the cooling module is increased, the heat dissipation capacity and heat dissipation efficiency of the cooling medium are increased, and the adaptability and flexibility of controlling and adjusting the cooling degree are increased.

[0112] When the thermostat is in the second working state, the detection unit detects the output displacement of the fracturing truck, and the analysis unit compares the output displacement with the critical displacement.

[0113] If the output displacement of the fracturing truck is less than the critical displacement, the analysis unit determines that the fuel is fully burned;

[0114] If the output displacement of the fracturing truck is greater than or equal to the critical displacement, the analysis unit determines that the fuel combustion is insufficient, and the analysis unit increases the minimum temperature value in the working temperature range of the third thermostat in the engine fuel cooling module 11;

[0115] The critical displacement is a preset value set by the temporary displacement data of the fracturing truck.

[0116] Specifically, excessive cooling of the engine will cause the cylinder temperature to be too low, the atomization degree of the combustible mixture to deteriorate, and the combustion to be incomplete, resulting in a decrease in engine power. The fuel that is not completely vaporized due to the low temperature increases the displacement of the fracturing truck, and the exhaust emission pollution is serious. The present invention quantifies the cooling capacity of the cooling module in the radiator unit by the output displacement of the fracturing truck, increases the working temperature range of the thermostat according to the cooling degree, reduces the pollution caused by the exhaust emission to the environment, increases the applicability of controlling and adjusting the cooling degree, avoids excessive cooling degree causing incomplete fuel combustion, and avoids the fuel that is not completely vaporized increases the displacement of the fracturing truck.

[0117] When the thermostat is in the second working state, the cooling fan 3 rotates at the initial minimum speed.

[0118] After the cooling medium is passed into the cooling module, the detection unit detects the actual maximum value and the actual minimum value of the circulation temperature;

[0119] The analysis unit calculates the heat generation according to the actual difference between the actual maximum value and the temperature minimum value of the thermostat working temperature range, calculates the heat dissipation according to the actual difference between the actual maximum value and the actual minimum value, and calculates the heat dissipation margin of the cooling module according to the heat generation and the heat dissipation, wherein the heat dissipation margin is equal to the heat dissipation minus the heat generation,

[0120] If the heat dissipation margin is greater than or equal to the standard value, the analysis unit determines that the heat dissipation margin of the cooling module meets the standard;

[0121] If the heat dissipation margin is less than the standard value, the analysis unit determines that the heat dissipation margin of the cooling module does not meet the standard and there is a risk of overheating. A signal is sent to the control unit to increase the initial minimum speed of the cooling fan 3 based on the ratio of the standard value to the heat dissipation margin.

[0122] In this embodiment, the standard value of the heat dissipation margin of the hydraulic oil cooling module 12, the pressure pump power end cooling module 13 and the transmission box cooling module 14 is 10%, and the standard value of the heat dissipation margin of the engine fuel cooling module 11, the engine steel jacket water cooling module 21 and the engine intercooler cooling module 22 is 5%.

[0123] Specifically, the heat dissipation margin refers to the additional heat dissipation capacity that the heat dissipation system can provide under normal working conditions. Due to the material, heat dissipation area and properties, the heat dissipation capacity of each module is different. The analysis module calculates the heat dissipation margin of each cooling module according to the heat generation and heat dissipation. The reliability and safety of the heat dissipation system and its adaptability under different working conditions are evaluated based on the comparison results between the heat dissipation margin and the standard value. The heat dissipation of each cooling module is increased by increasing the initial minimum speed of the cooling fan 3, thereby increasing the heat dissipation margin of each cooling module, improving the reliability, safety and adaptability of the heat dissipation system, and reducing the risk of overheating of the device of the fracturing truck under different working conditions.

[0124] In this embodiment, the cooling water of the steel jacket and the intercooler 7 in the engine 5 flows through the second layer 2 of the radiator unit via the water pump 6, and the cooling water exchanges heat with the cooling air blown by the cooling fan 3 driven by the hydraulic motor 4 at the second layer of the radiator unit and flows into the water tank 8. The water tank 8 stores the cooling water when the thermostat is not opened; the fuel in the engine 5 flows into the first layer 1 of the radiator unit after the thermostat is opened, and the fuel exchanges heat with the cooling air blown by the cooling fan 3 driven by the hydraulic motor 4 at the first layer of the radiator unit and is transported back to the engine 5.

[0125] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0126] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A horizontal heat dissipation system for a fracturing truck, characterized in that: include: The radiator unit is divided into two layers. The first layer of the radiator unit includes an engine fuel cooling module, a hydraulic oil cooling module, a pressure pump power end cooling module and a transmission case cooling module; the second layer of the radiator unit includes an engine steel jacket water cooling module and an engine intercooler cooling module; A cooling fan, which blows cooling air into the radiator unit by rotating, wherein the cooling fan is connected to a hydraulic motor; A detection unit, which is connected to the analysis unit and includes a temperature sensor, a displacement sensor and a counter, and is used to detect the circulation temperature of the cooling medium, the working number of the thermostat and the output displacement of the fracturing vehicle, and transmit the data to the analysis unit; An analysis unit connected to the control unit, wherein the analysis unit is provided with weights of each cooling module, a temperature difference evaluation value, a thermostat operating temperature range, a first scoring standard coefficient of the first layer of the radiator unit, and a second scoring standard coefficient of the second layer of the radiator unit; The analysis unit is used to adjust the working state of the thermostat according to the working temperature range of the thermostat and the circulation temperature of the cooling medium, judge the distribution of cooling modules that need heat dissipation according to the working number of the thermostat, calculate the maximum temperature difference according to the temperature difference and weight between the circulation temperature and the corresponding minimum temperature and the scoring standard coefficient, adjust the actual speed of the cooling fan according to the maximum temperature difference, adjust the heat dissipation area according to the temperature difference judgment result, and judge the cooling degree and heat dissipation margin of each cooling module. The control unit is used to adjust the actual speed and the initial minimum speed of the cooling fan according to the instructions of the analysis module, and control the working state of the thermostat and the opening and closing of the fixed switch.

2. The horizontal heat dissipation system of a fracturing truck according to claim 1, characterized in that: The engine fuel cooling module, hydraulic oil cooling module, pressure pump power end cooling module and transmission box cooling module in the first layer of the radiator unit are arranged in parallel on the bottom layer of the radiator unit; The engine steel jacket water cooling module and the engine intercooler cooling module in the second layer of the radiator unit are arranged in parallel on the upper layer of the radiator unit; The cooling fan and the hydraulic motor are arranged at the bottom of the radiator unit; A heat dissipation pipeline loop is arranged inside the cooling module, the pipeline loop inside the engine fuel cooling module is connected to the pipeline loop inside the hydraulic oil cooling module; the pipeline loop inside the pressure pump power end cooling module is connected to the pipeline loop inside the transmission box cooling module; A telescopic section that can be telescopically moved and a telescopic spring fixed to the pipeline wall are arranged at the pipeline loop connection, the telescopic section is connected to the telescopic spring, a fixed switch is arranged inside the telescopic section, and the fixed switch can fix the telescopic end at the initial position.

3. The horizontal heat dissipation system of a fracturing truck according to claim 1, characterized in that: The detection unit detects the circulation temperature of the cooling medium circulating in the pipeline loop in the cooling module. If the circulation temperature exceeds the operating temperature range of the thermostat, the analysis unit determines that the circulation temperature of the cooling medium in the corresponding module loop exceeds the normal range, and the analysis unit sends a signal to the control unit to adjust the thermostat to the first working state; If the circulation temperature does not exceed the operating temperature range of the thermostat, the analysis unit determines that the circulation temperature of the cooling medium in the corresponding module loop does not exceed the normal range, and the analysis unit sends a signal to the control unit to adjust the thermostat to the second working state; Wherein, the cooling medium includes fuel oil, lubricating oil, hydraulic oil and cooling water.

4. The horizontal heat dissipation system of a fracturing truck according to claim 3, characterized in that: When any thermostat is in the second working state, the thermostat is closed, the cooling medium corresponding to the cooling module of the first layer of the radiator unit does not flow into the radiator unit, and the cooling medium circulates in the corresponding device and pipeline loop; the cooling medium in the corresponding cooling module of the second layer of the radiator unit circulates in the radiator unit through the bypass pipeline, and the analysis unit determines the cooling degree of each cooling module; When any thermostat is in the first working state, the thermostat is opened, and the cooling medium of the cooling module corresponding to the thermostat of the first layer of the radiator unit is passed into the cooling module and cooled inside the circulation pipeline. The cooling medium in the corresponding cooling module of the second layer of the radiator unit cools the corresponding device through the circulation pipeline. The analysis unit adjusts the fan speed and working state according to the working number of the thermostat.

5. The horizontal heat dissipation system of a fracturing truck according to claim 1, characterized in that: The detection unit detects the number of thermostats in the cooling module that are in a first working state. If the number of operations is not one, the analysis unit determines that there are a number of cooling modules that need heat dissipation, and determines the distribution of the cooling modules that need heat dissipation according to the working state of the thermostat; If the number of jobs is equal to one, the analysis unit determines that there is only one cooling module that needs to dissipate heat, and calculates the temperature difference between the circulation temperature of the cooling medium detected by the detection unit and the minimum value of the working temperature range of the thermostat, and increases the actual speed of the cooling fan according to the ratio of the temperature difference to the temperature difference evaluation value; Specifically, the temperature difference evaluation value is a preset value set according to historical data of the cycle temperature and the corresponding actual rotation speed.

6. The horizontal heat dissipation system of a fracturing truck according to claim 5, characterized in that: When the working number is not one, if the thermostat in the first working state is some of the third thermostat, the fourth thermostat, the fifth thermostat and the sixth thermostat, or the thermostat in the first working state is the first thermostat and the second thermostat, the analysis unit determines that the cooling modules that need heat dissipation are in the same layer; If the thermostats in the first working state are some of the third thermostat, the fourth thermostat, the fifth thermostat and the sixth thermostat and some of the first thermostat and the second thermostat, the analyzing unit determines that the cooling modules that need heat dissipation are not in the same layer.

7. The horizontal heat dissipation system of a fracturing truck according to claim 6, characterized in that: When the cooling modules that need to dissipate heat are in the same layer, the analysis unit calculates the temperature difference between the circulation temperature of several cooling media and the minimum value of the working temperature range of the corresponding thermostat, and increases the actual speed of the cooling fan according to the ratio of the maximum value of the temperature difference to the corresponding temperature difference evaluation value; The maximum temperature difference is equal to the maximum value of the product of the temperature difference and the corresponding cooling module weight; When the cooling modules that need to dissipate heat are not in the same layer, the cooling air of the cooling fan first flows through the first layer of the radiator unit and then flows through the second layer of the radiator unit. The analysis unit calculates the temperature difference between the circulation temperature of several cooling media and the minimum value of the working temperature range of the corresponding thermostat, and increases the actual speed of the cooling fan according to the ratio of the maximum value of the temperature difference to the corresponding temperature difference evaluation value. The maximum value of the temperature difference is equal to the maximum value of the product of the temperature difference, the corresponding cooling module weight and the scoring standard of the layer number; The scoring standard is equal to the product of the first scoring standard coefficient and the second scoring standard coefficient and the sum of the weights of the cooling modules in the same layer; The weight of the engine fuel cooling module is greater than that of the transmission box cooling module, greater than that of the pressure pump power end cooling module, and greater than that of the hydraulic oil cooling module; the first scoring standard coefficient is less than the second scoring standard coefficient.

8. The horizontal heat dissipation system of a fracturing truck according to claim 7, characterized in that: The analysis unit compares the temperature difference with the corresponding difference evaluation value. If the temperature difference is less than or equal to the corresponding difference evaluation value, the analysis unit determines that the temperature difference is within the normal temperature difference range; If the temperature difference is greater than the corresponding difference evaluation value, the analysis unit determines that the temperature difference exceeds the normal temperature difference range, and the control unit opens the fixed switch inside the telescopic section.

9. The horizontal heat dissipation system of a fracturing truck according to claim 1, characterized in that: After the cooling medium is passed into the cooling module, the detection unit detects the actual maximum value and the actual minimum value of the circulation temperature; The analysis unit calculates the heat generation according to the actual difference between the actual maximum value and the temperature minimum value of the thermostat working temperature range, calculates the heat dissipation according to the actual difference between the actual maximum value and the actual minimum value, and calculates the heat dissipation margin of the cooling module according to the heat generation and the heat dissipation, wherein the heat dissipation margin is equal to the heat dissipation minus the heat generation, If the heat dissipation margin is greater than or equal to the standard value, the analysis unit determines that the heat dissipation margin of the cooling module meets the standard; If the heat dissipation margin is less than the standard value, the analysis unit determines that the heat dissipation margin of the cooling module does not meet the standard and there is a risk of overheating, and increases the initial minimum speed of the cooling fan according to the ratio of the standard value to the heat dissipation margin.

10. The horizontal heat dissipation system of a fracturing truck according to claim 3, characterized in that: When the thermostat is in the second working state, the detection unit detects the output displacement of the fracturing truck, and the analysis unit compares the output displacement with the critical displacement. If the output displacement of the fracturing truck is less than the critical displacement, the analysis unit determines that the fuel is fully burned; If the output displacement of the fracturing truck is greater than or equal to the critical displacement, the analysis unit determines that the fuel combustion is insufficient, and the analysis unit increases the minimum temperature value in the working temperature range of the third thermostat in the engine fuel cooling module; The critical displacement is a preset value set by the temporary displacement data of the fracturing truck.

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