CN220930145U - Liquid cooling system of gearbox of pure electric mining dump truck - Google Patents
Liquid cooling system of gearbox of pure electric mining dump truck Download PDFInfo
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- CN220930145U CN220930145U CN202322847608.5U CN202322847608U CN220930145U CN 220930145 U CN220930145 U CN 220930145U CN 202322847608 U CN202322847608 U CN 202322847608U CN 220930145 U CN220930145 U CN 220930145U
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- vcu
- cooling
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- 238000001816 cooling Methods 0.000 title claims abstract description 97
- 239000007788 liquid Substances 0.000 title claims abstract description 19
- 238000005065 mining Methods 0.000 title claims abstract description 19
- 239000000498 cooling water Substances 0.000 claims abstract description 53
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 230000005540 biological transmission Effects 0.000 claims description 16
- 238000004891 communication Methods 0.000 claims description 4
- 230000033228 biological regulation Effects 0.000 claims description 3
- 230000003993 interaction Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 description 13
- 230000017525 heat dissipation Effects 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000009194 climbing Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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Abstract
The utility model discloses a liquid cooling system of a gear box of a pure electric mining dump truck, which comprises the following components: the vehicle control unit VCU, the radiator, the cooling water pump and the gearbox are arranged, the radiator is provided with a cooling fan and a cooling fan controller, the gearbox is provided with a heat exchanger and a gearbox controller, and the cooling water pump is provided with a cooling water pump controller; the water outlet of the radiator is connected with the water inlet of the cooling water pump through a radiating pipeline, the water outlet of the cooling water pump is connected with the water inlet of the heat exchanger through a radiating pipeline, and the water outlet of the heat exchanger is connected with the water inlet of the radiator through a radiating pipeline; the VCU is connected with the cooling fan controller and the cooling water pump controller through signal lines respectively. According to the utility model, the start and stop of the cooling water pump and the working state of the cooling fan can be automatically controlled according to the oil temperature of the gearbox, and the large-range fluctuation of the rotating speed of the fan at the critical temperature value is avoided.
Description
Technical Field
The utility model belongs to the technical field of pure electric mining dumpers, and particularly relates to a liquid cooling system of a gearbox of a pure electric mining dumper.
Background
In recent years, pure electric mining dump trucks have become important transportation tools for mines by virtue of the advantages of low running cost, low maintenance cost, high working efficiency, zero emission and the like, and a gearbox is taken as an important part of an electric drive system, so that the effect of reducing speed and increasing torque can be achieved in the climbing process of a mine car, and the climbing capacity of the mine car is enhanced; meanwhile, in the heavy-load downhill process of the mine car, a driver can adjust the transmission ratio and the energy recovery efficiency of the gearbox through gear shifting. It can be seen that the performance of the gearbox has an important impact on the safety of the mine car, the working efficiency and the energy consumption. The performance of the gearbox is greatly affected by temperature, and the high oil temperature of the gearbox can cause the problems of low transmission efficiency, low gear shifting speed, incapability of gear shifting and the like, so that the safety of a mine car and the mine production efficiency are seriously affected.
At present, a gearbox cooling system basically adopts a liquid cooling mode, a cooling fan and a cooling water pump are required to be controlled, the traditional control method is simple in logic, the rotating speed of the cooling fan is easy to fluctuate in a large range at a critical temperature point, the mechanical loss of the cooling fan is increased, and the reliability of the cooling system is reduced.
Disclosure of utility model
The utility model aims to provide a liquid cooling system of a gear box of a pure electric mining dump truck, which can automatically control the start and stop of a cooling water pump and the working state of a cooling fan according to the oil temperature of the gear box, and avoid the wide fluctuation of the rotating speed of the fan at a critical temperature value.
In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:
The utility model provides a pure electric mining dump truck gearbox liquid cooling system, includes: the vehicle control unit VCU, the radiator, the cooling water pump and the gearbox are arranged, the radiator is provided with a cooling fan and a cooling fan controller, the gearbox is provided with a heat exchanger and a gearbox controller, and the cooling water pump is provided with a cooling water pump controller; the water outlet of the radiator is connected with the water inlet of the cooling water pump through a radiating pipeline, the water outlet of the cooling water pump is connected with the water inlet of the heat exchanger through a radiating pipeline, and the water outlet of the heat exchanger is connected with the water inlet of the radiator through a radiating pipeline; the VCU is respectively connected with the cooling fan controller and the cooling water pump controller through signal lines, the VCU controls the rotating speed of the cooling fan and the start and stop of the cooling water pump, the VCU is connected with the gearbox controller through a control bus, and the VCU acquires the temperature value of gearbox oil in the gearbox fed back by the gearbox controller through the control bus.
Further, a Pulse Width Modulation (PWM) signal line is selected as the signal line, and the VCU controls and controls the rotating speed of the cooling fan and the start and stop of the cooling water pump in a PWM mode; the VCU, the cooling fan controller and the cooling water pump controller are respectively provided with PWM interfaces.
Further, the cooling fan controller reads the speed regulation signal of the VCU through the PWM interface, and simultaneously feeds back the rotating speed of the cooling fan to the VCU through the PWM interface.
Further, the control bus is a Controller Area Network (CAN) bus, the VCU and the gearbox controller are respectively provided with a CAN bus communication interface, and the VCU performs information interaction with the gearbox controller through the CAN bus.
Further, the gearbox controller reports a temperature value to the VCU through the CAN bus, and the VCU detects the temperature value of the gearbox in real time.
The technical effects of the utility model include:
1. The start and stop of the cooling water pump and the working state of the cooling fan can be automatically controlled according to the oil temperature of the gearbox;
2. The cooling fan can be kept in the rotation speed in the oil temperature falling process of the gearbox, so that the large-range fluctuation of the rotation speed of the fan is effectively avoided, the mechanical loss of the fan is reduced, and the reliability of the system is improved;
3. the oil temperature rise of the gearbox can be effectively controlled, and the efficiency of a transmission system is improved;
4. The working efficiency of the liquid cooling system of the gearbox can be improved, and the method is simple and low in energy consumption.
Drawings
FIG. 1 is a structural schematic diagram of a liquid cooling system of a gear box of a pure electric mining dump truck;
FIG. 2 is a workflow diagram of a control method of a liquid cooling system of a gearbox of a pure electric mining dump truck;
FIG. 3 is a graphical representation of cooling fan speed as a function of temperature value of gearbox oil in accordance with the present utility model.
Detailed Description
The following description fully illustrates the specific embodiments of the utility model to enable those skilled in the art to practice and reproduce it.
Fig. 1 is a schematic diagram of the liquid cooling system of the gearbox of the pure electric mining dump truck.
The utility model provides a pure electric mining dump truck gearbox liquid cooling system, includes: a Vehicle Control Unit (VCU) 1, a radiator 2, a cooling water pump 3 and a gearbox 4.
The radiator 2 is provided with a cooling fan 21, a cooling fan controller, the gearbox 4 is provided with a heat exchanger 41 (for heat exchange with gearbox oil in the gearbox 4), the gearbox controller, and the cooling water pump 3 is provided with a cooling water pump controller; the water outlet of the radiator 2 is connected with the water inlet of the cooling water pump 3 through a heat dissipation pipeline 5, the water outlet of the cooling water pump 3 is connected with the water inlet of the heat exchanger 41 through the heat dissipation pipeline 5, and the water outlet of the heat exchanger 41 is connected with the water inlet of the radiator 2 through the heat dissipation pipeline 5; the radiator 2, the cooling water pump 3, the heat exchanger 41 and the heat dissipation pipeline 5 form a heat dissipation loop; the VCU1 is respectively connected with a cooling fan controller of the cooling fan 21 and a cooling water pump controller of the cooling water pump 3 through a signal line 6, the VCU1 controls the rotating speed of the cooling fan 21 and the start and stop of the cooling water pump 3, the VCU1 is connected with a gearbox controller through a control bus 7, and the VCU1 acquires a temperature value of gearbox oil in the gearbox 4 fed back by the gearbox controller through the control bus 7.
In the preferred embodiment, the signal line 6 is a PWM (Pulse Width Modulation ) signal line, and the VCU1 controls and controls the rotation speed of the cooling fan 21 and the start and stop of the cooling water pump 3 through PWM. The VCU1, the cooling fan controller and the cooling water pump controller are respectively provided with a PWM interface, the PWM interface has a two-way communication function, the PWM interface is used for controlling analog circuit equipment through digital output, and the PWM interface can set the frequency and the duty ratio of output square waves to realize the start and stop of the cooling water pump 3 and the rotating speed and the start and stop of the cooling fan 21. The cooling fan controller reads the speed regulation signal of the VCU1 through the PWM interface, and simultaneously feeds back the operating state (rotation speed) of the cooling fan 21 to the VCU1 through the PWM interface.
In the preferred embodiment, the control bus 7 is a CAN (ControllerArea Network ) bus. The VCU1 and the gearbox controller are respectively provided with a CAN bus communication interface, the VCU1 exchanges information with the gearbox controller through a CAN bus, the gearbox controller reports a temperature value to the VCU1 through the CAN bus, and the VCU1 detects the temperature of the gearbox 4 in real time.
As shown in fig. 2, the utility model is a working flow chart of a control method of a gearbox liquid cooling system of a pure electric mining dump truck.
The control method of the liquid cooling system of the gearbox of the pure electric mining dump truck comprises the following specific steps:
Step S1: the VCU1 checks whether the vehicle is in a starting state, if so, the step S2 is executed, otherwise, the step 3 is executed;
Step S2: the VCU1 checks whether the temperature value of the gearbox oil in the gearbox 4 is more than or equal to the critical temperature value of the head end, if yes, the step S4 is executed, otherwise, the step S5 is executed;
The gearbox controller reports the temperature value of gearbox oil to the VCU1 through the CAN bus, the VCU1 reads the temperature value of the gearbox oil, if the temperature of the oil is greater than or equal to 90 ℃ of the critical temperature value of the head end, the step S4 is executed, and otherwise, the step S5 is executed.
Step S3: the VCU1 commands the cooling water pump 3 on the heat dissipation loop 5 to stop working, the cooling fan 21 of the radiator 2 stops working, and the flow is ended;
the VCU1 sends a command to the cooling water pump controller through the PWM signal line, and the cooling water pump controller controls the cooling water pump 3 to stop working after receiving the command.
Step S4: the VCU1 commands the cooling water pump 3 to start working, and step S7 is executed;
The VCU1 sends a command to the cooling water pump controller through the PWM signal line, and the cooling water pump controller controls the cooling water pump 3 to start working after receiving the command.
Step S5: VCU1 instructs cooling fan 21 to stop running, and step S6 is executed;
The VCU1 issues a command to the cooling fan controller via the PWM signal line, and the cooling fan controller controls the cooling fan 21 to stop operating.
Step S6: the VCU1 checks whether the temperature value of the transmission oil in the transmission 4 is less than the cooling pump intervention temperature value (85 ℃), and if the cooling water pump 3 is still operating, the VCU1 instructs the cooling water pump 3 to stop operating, otherwise the flow is ended.
The VCU1 sends a command to the cooling water pump controller through the PWM signal line, and the cooling water pump controller controls the cooling water pump 3 to stop working after receiving the command.
Step S7: the VCU1 detects the temperature value of the transmission oil in the transmission 4, and when the temperature value is within the set temperature interval, the VCU1 controls the cooling fan 21 to change the rotation speed according to a step, and when the temperature value of the transmission oil is at the critical temperature value, the rotation speed of the cooling fan 21 is kept unchanged.
The gearbox controller reports the temperature value of the current gearbox oil to the VCU1 through the CAN bus, the VCU1 judges that the current temperature value is in a set temperature range, the VCU1 sends a command to the cooling fan controller through the PWM signal line, and the cooling fan controller controls the cooling fan 21 to operate at a set rotating speed or change the rotating speed according to steps.
The set temperature interval is a temperature interval between the head end critical temperature value and the tail end critical temperature value.
As shown in fig. 3, the rotation speed of the cooling fan 21 according to the present utility model is schematically shown as a function of the temperature value of the gearbox oil.
In the present preferred embodiment, the set rotational speed of the cooling fan 21 includes: the rotation speed of the cooling fan 21 may be further divided as needed, with the first speed (low rotation speed), the second speed (medium rotation speed), and the third speed (high rotation speed), with the first speed < the second speed < the third speed. Dividing the rotating speed into a plurality of areas, and sequentially: a stall zone 1-1, a rotation speed maintaining zone 1-2, a low rotation speed zone 2-1, a rotation speed maintaining zone 2-2, a medium rotation speed zone 3-1, a rotation speed maintaining zone 3-2 and a high rotation speed zone.
The threshold temperature value includes: the first critical temperature value is less than the second critical temperature value and less than the third critical temperature value, the first critical temperature value is 95 ℃, the second critical temperature value is 105 ℃, and the third critical temperature value is 115 ℃. The rotation speed of the cooling fan 21 at the critical temperature value is changed in a jump. Dividing the temperature interval into the following steps: a first temperature interval, a second temperature interval, a third temperature interval, and a fourth temperature interval. At this time, among the first critical temperature value, the second critical temperature value, and the third critical temperature value, the first critical temperature value is used as the head critical temperature value, and the third critical temperature value is used as the tail critical temperature value.
The temperature hysteresis value is determined based on the temperature rise characteristics of the transmission oil, and in the preferred embodiment, the temperature hysteresis value is 5-10 c.
The VCU1 controls the rotating speed of the cooling fan 21 in real time according to the temperature value of the gearbox oil to realize step-like change, wherein the temperature value is smaller than 90 ℃ and is step one, and the cooling fan 21 stops rotating; the temperature value is more than or equal to 90 ℃ and less than 105 ℃ which is a step two, and the cooling fan 21 runs at a low rotating speed; the temperature value is more than or equal to 105 ℃ and less than 115 ℃ which is step three, and the cooling fan 21 runs at medium speed; the cooling fan 21 is operated at a high speed with a temperature of 115 ℃ or higher being step four.
Step S71: the VCU1 judges whether the temperature value of the gearbox oil is larger than or equal to a first critical temperature value and smaller than a second critical temperature value, if yes, the step S72 is executed, otherwise, the step S74 is executed;
Step S72: the VCU1 determines whether the temperature value of the transmission oil is less than the temperature value of the second critical temperature value minus the temperature hysteresis value, or whether the cooling fan 21 is in a stopped state; if yes, executing step S73, otherwise ending the flow;
the temperature value of 105 ℃ minus the temperature hysteresis value of 5 ℃ is 100 ℃.
Step S73: the VCU1 controls the cooling fan 21 to operate at a first speed (low rotation speed);
The VCU1 issues a command to the cooling fan controller via the PWM signal line, and the cooling fan controller controls the cooling fan 21 to operate at a first speed.
Step S74: the VCU1 judges whether the temperature value of the gearbox oil is larger than or equal to the second critical temperature value and smaller than the third critical temperature value, if yes, the step S75 is executed, otherwise, the step S77 is executed;
step S75: the VCU1 determines whether the temperature value of the transmission oil is less than the temperature value of the third critical temperature value minus the temperature hysteresis value, or whether the cooling fan 21 is in the first speed operation; if yes, executing step S76, otherwise ending the flow;
the temperature at which the third critical temperature value 115 ℃ minus the temperature hysteresis value 5 ℃ is 110 ℃.
Step S76: the VCU1 controls the cooling fan 21 to operate at a second speed (medium rotation speed);
Step S77: the VCU1 judges whether the temperature value of the gearbox oil is larger than or equal to a third critical temperature value, if yes, the step S48 is executed, otherwise, the flow is ended;
Step S78: the VCU1 controls the cooling fan 21 to operate at a third speed (high rotational speed).
The temperature hysteresis value is 5-10 ℃, and the set temperature interval is 95-110 ℃, so that the first critical temperature value is avoided being 95 ℃, the second critical temperature value is 105 ℃, and the third critical temperature value is 115 ℃ in the rotating speed change process of the cooling fan 21, and the cooling fan 21 is prevented from vibrating at the critical temperature value under the premise of ensuring that the temperature value of the gearbox oil normally works within the critical temperature interval (the critical temperature interval is determined according to the rated working condition of the gearbox 4, and the temperature interval is the temperature interval from the first critical temperature value to the third critical temperature value in the preferred embodiment).
The method comprises the following steps: when the temperature value of the transmission oil of the transmission 4 rises from the stall zone 1-1 to the rotation speed holding zone 1-2, the cooling fan 21 is kept stalled; when the temperature value of the gearbox oil is reduced from the interval rotation speed maintaining area 1-2 to the stalling area 1-1, the cooling fan 21 keeps running at a low rotation speed to prevent the rotation speed of the cooling fan 21 from widely fluctuating at a first critical temperature value between a first temperature interval and a second temperature interval, and the temperature hysteresis value of the rotation speed maintaining method is generally determined according to the characteristics of the gearbox 4, and the recommended value is 5 ℃.
When the temperature value of the gearbox oil rises from the low rotation speed zone 2-1 to the rotation speed maintaining zone 2-2, the cooling fan 21 keeps running at a low rotation speed; when the temperature value of the gearbox oil is reduced from the rotation speed maintaining area 2-2 to the low rotation speed area 2-1, the cooling fan 21 keeps rotating at a medium speed to prevent the rotation speed of the cooling fan 21 from widely fluctuating at a second critical temperature value between a second temperature interval and a third temperature interval, and the temperature hysteresis value of the rotation speed maintaining method is generally determined according to the characteristics of the gearbox 4, and the recommended value is 5 ℃.
When the temperature value of the gearbox oil rises from the medium rotation speed zone 3-1 to the rotation speed maintaining zone 3-2, the cooling fan 21 maintains the medium rotation speed operation; when the temperature value of the gearbox oil is reduced from the rotation speed maintaining area 3-2 to the middle rotation speed area 3-1, the cooling fan 21 keeps running at a high rotation speed to prevent the rotation speed of the cooling fan 21 from fluctuating widely at a third critical temperature value between a third temperature interval and a fourth temperature interval, and the temperature hysteresis value of the rotation speed maintaining method is generally determined according to the characteristics of the gearbox 4, and the recommended value is 5 ℃.
The terminology used herein is for the purpose of description and illustration only and is not intended to be limiting. As the present utility model may be embodied in several forms without departing from the spirit or essential attributes thereof, it should be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the metes and bounds of the claims, or equivalences of such metes and bounds are therefore intended to be embraced by the appended claims.
Claims (5)
1. The utility model provides a pure electric mining dump truck gearbox liquid cooling system which characterized in that includes: the vehicle control unit VCU, the radiator, the cooling water pump and the gearbox are arranged, the radiator is provided with a cooling fan and a cooling fan controller, the gearbox is provided with a heat exchanger and a gearbox controller, and the cooling water pump is provided with a cooling water pump controller; the water outlet of the radiator is connected with the water inlet of the cooling water pump through a radiating pipeline, the water outlet of the cooling water pump is connected with the water inlet of the heat exchanger through a radiating pipeline, and the water outlet of the heat exchanger is connected with the water inlet of the radiator through a radiating pipeline; the VCU is respectively connected with the cooling fan controller and the cooling water pump controller through signal lines, the VCU controls the rotating speed of the cooling fan and the start and stop of the cooling water pump, the VCU is connected with the gearbox controller through a control bus, and the VCU acquires the temperature value of gearbox oil in the gearbox fed back by the gearbox controller through the control bus.
2. The liquid cooling system of the gear box of the pure electric mining dump truck according to claim 1, wherein a Pulse Width Modulation (PWM) signal line is selected as the signal line, and the VCU controls and controls the rotation speed of the cooling fan and the start and stop of the cooling water pump in a PWM mode; the VCU, the cooling fan controller and the cooling water pump controller are respectively provided with PWM interfaces.
3. The electric only mining dump truck gearbox liquid cooling system of claim 2, wherein the cooling fan controller reads the speed regulation signal of the VCU through the PWM interface, and simultaneously feeds back the rotational speed of the cooling fan to the VCU through the PWM interface.
4. The liquid cooling system for the gearbox of the pure electric mining dump truck according to claim 1, wherein the control bus is a Controller Area Network (CAN) bus, the VCU and the gearbox controller are respectively provided with a CAN bus communication interface, and the VCU performs information interaction with the gearbox controller through the CAN bus.
5. The electric only mining dump truck transmission liquid cooling system of claim 4, wherein the transmission controller reports a temperature value to the VCU via the CAN bus, and the VCU detects the temperature value of the transmission in real time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322847608.5U CN220930145U (en) | 2023-10-23 | 2023-10-23 | Liquid cooling system of gearbox of pure electric mining dump truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322847608.5U CN220930145U (en) | 2023-10-23 | 2023-10-23 | Liquid cooling system of gearbox of pure electric mining dump truck |
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| Publication Number | Publication Date |
|---|---|
| CN220930145U true CN220930145U (en) | 2024-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322847608.5U Active CN220930145U (en) | 2023-10-23 | 2023-10-23 | Liquid cooling system of gearbox of pure electric mining dump truck |
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| Country | Link |
|---|---|
| CN (1) | CN220930145U (en) |
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2023
- 2023-10-23 CN CN202322847608.5U patent/CN220930145U/en active Active
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