Cooling system of hybrid milling machine and milling machine

Abstract

The invention discloses a hybrid milling machine heat dissipation system and a milling machine, and the hybrid milling machine heat dissipation system comprises an engine water heat dissipation system, an engine intercooling heat dissipation system, a hydraulic heat dissipation system and a motor electric control heat dissipation system, is provided with at least one fan driven by a high-pressure fan motor, and is provided with a power battery heat management system. The power battery thermal management system is integrally arranged in a cold air side area in areas needing ventilation of the engine water heat dissipation system, the engine intercooling heat dissipation system, the hydraulic heat dissipation system and the motor electric control heat dissipation system; the motor electric control heat dissipation system comprises a milling drive motor and range extending generator heat dissipation subsystem, a hydraulic oil pump motor heat dissipation subsystem and a fan drive motor heat dissipation subsystem. The cooling subsystem for the milling drive motor and the extended range generator, the cooling subsystem for the hydraulic oil pump motor and the cooling subsystem for the fan drive motor are mutually independent, and independent cooling control can be carried out according to operation conditions.

Description

Technical Field

[0001] The present invention relates to the field of engineering machinery, and in particular to a hybrid milling machine heat dissipation system and the milling machine. Background Art

[0002] With increasing demands for energy conservation and environmental protection, new energy construction machinery, such as pure electric and hybrid types, has emerged in the market. In the specific area of ​​milling machines, pure electric milling machines are limited by factors such as charging time, charging station layout, and battery life, making them unable to operate continuously under specific operating conditions. Hybrid milling machines can meet these requirements for continuous operation and offer significant advantages over traditional fuel-powered milling machines in terms of energy conservation and emission reduction.

[0003] A hybrid milling machine utilizes two power sources: a range extender and a power battery. In line with the vehicle's functional requirements, these include hydraulic systems for propulsion, cylinder control, and material feeding, as well as a milling drive system. The primary heat sources include the engine, milling drive motor, range extender generator, hydraulic oil pump motor, fan drive motor, motor controller, and power battery. Therefore, the hybrid milling machine's cooling system includes engine water cooling, engine intercooler cooling, hydraulic cooling system, motor electronic control cooling, and a power battery thermal management system. Given the numerous heat-generating components involved, effective heat dissipation is crucial.

[0004] Existing technologies, such as patent application number 201911300654.5, disclose a hybrid vehicle radiator assembly that integrates various heat dissipation components, saving interior vehicle space. However, using only a single fan to facilitate heat exchange between the generator radiator and the drive motor radiator and the air makes it difficult to meet the differentiated water temperature requirements of the generator and drive motor water inlets. Patent application number 202410371830.9 discloses a hybrid loader cooling system and control method. The travel motor unit, master controller, hydraulic motor unit, and range extender unit share a single radiator assembly. While this simplifies the number of components and saves layout space, the heat dissipation cycles of each unit are not independent and may affect each other. In some related technologies, hybrid vehicles integrate the radiator assembly, with each radiator controlled by an independent electronic fan, using a 24V low-voltage control system. Because low-voltage electronic fans have small blade diameters and low air volume, multiple fans are required, resulting in a larger radiator assembly and an increase in failure points.

[0005] Therefore, it is necessary to develop a new hybrid milling machine cooling system and milling machine to overcome the above problems. Summary of the Invention

[0006] Purpose of the invention: In view of the shortcomings and defects of the existing technology, the present invention provides a hybrid milling machine heat dissipation system and a milling machine. The milling drive motor and the range extender generator heat dissipation subsystem, the hydraulic oil pump motor heat dissipation subsystem and the fan drive motor heat dissipation subsystem are independent of each other and can perform independent heat dissipation control according to the operating conditions.

[0007] Technical solution: A hybrid milling machine cooling system of the present invention is characterized in that it includes an engine water cooling system, an engine intercooler cooling system, a hydraulic cooling system and a motor electronic control cooling system, is equipped with at least one fan driven by a high-voltage fan motor, and is equipped with a power battery thermal management system, and the power battery thermal management system is arranged as a whole in the cold air side area of ​​the ventilation area required by the engine water cooling system, the engine intercooler cooling system, the hydraulic cooling system and the motor electronic control cooling system; the motor electronic control cooling system includes a milling drive motor and range extender generator cooling subsystem, a hydraulic oil pump motor cooling subsystem and a fan drive motor cooling subsystem; the milling drive motor and range extender generator cooling subsystem includes a sub-radiator 1, a water pump 1, a controller 1, a milling drive motor, a range extender generator and pipelines connected in sequence; the hydraulic oil pump motor cooling subsystem includes a water pump 2, a controller 2, a diverter valve 2, at least one hydraulic oil pump motor and pipelines connected in sequence; the fan drive motor cooling subsystem includes a sub-radiator 3, a water pump 3, a controller 3, at least one high-pressure fan motor and pipelines connected in sequence.

[0008] Among them, the engine water cooling system includes a water radiator, the engine intercooler cooling system includes an intercooler radiator, the hydraulic cooling system includes a hydraulic radiator, and the motor electronic control cooling system includes a sub-radiator 1, a sub-radiator 2 and a sub-radiator 3 arranged in parallel; the intercooler radiator, the water radiator, the sub-radiator 3, the hydraulic radiator, the sub-radiator 2 and the sub-radiator 1 constitute a combined radiator.

[0009] Among them, the sub-radiator 1, the sub-radiator 2 and the sub-radiator 3 are not arranged adjacent to the intercooler radiator.

[0010] Among them, the engine water cooling system is provided with an expansion water tank 1, and the subsystems of the motor electronic control cooling system share the expansion water tank 2 for heat dissipation; the specifications of the water pump 1, water pump 2 and water pump 3 are the same.

[0011] Among them, the milling drive motor and the range-extended generator of the milling drive motor and range-extended generator heat dissipation subsystem are arranged in parallel; the controller 1 is a two-in-one controller, which can independently control the milling drive motor and the range-extended generator; a diverter valve 1 is set between the controller 1 and the milling drive motor.

[0012] Among them, controller 2 of the hydraulic oil pump motor heat dissipation subsystem is an all-in-one controller, which can separately control at least one of hydraulic oil pump motor 1 and hydraulic oil pump motor 2. When there are more than one hydraulic oil pump motors, they are arranged in parallel, and diverter valve 2 is set between controller 2 and the hydraulic oil pump motor.

[0013] Among them, controller three of the fan drive motor heat dissipation subsystem is an all-in-one controller, which can separately control at least one of high-voltage fan motor one, high-voltage fan motor two, and high-voltage fan motor three. When there are more than one high-voltage fan motors, they are arranged in parallel, and a diverter valve three is set between controller three and the high-voltage fan motor.

[0014] Among them, the high-voltage fan motor 1, the high-voltage fan motor 2, and the high-voltage fan motor 3 are water-cooled structures, and the voltage is a DC voltage and is greater than 600V.

[0015] Among them, the combined radiator is located in the upper area of ​​the rear of the power compartment cover and has a corresponding air outlet, the power battery thermal management system is located below the combined radiator, and an air inlet is provided at the rear of the power compartment cover.

[0016] The flow rates of the water pump 1, water pump 2 and water pump 3 are increased or decreased independently according to the temperature of each heat dissipation component. When the temperature is high, the flow rate increases, and vice versa.

[0017] The rotation speed of the fan is independently controlled according to the heat dissipation conditions of each heat dissipation component. When the temperature is high, the rotation speed increases, and vice versa.

[0018] A milling machine is characterized by using the hybrid milling machine heat dissipation system of the present invention.

[0019] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: the cooling subsystems of the milling drive motor and the range extender generator, the cooling subsystem of the hydraulic oil pump motor and the cooling subsystem of the fan drive motor are independent of each other and can be independently controlled according to the operating conditions; compared with the cooling system with a matching single fan structure, the fan speed can be individually controlled according to the cooling requirements of the components involved in different areas, thereby effectively reducing energy consumption and noise; the power battery is arranged on the cold air side, which is beneficial to reducing the burden on the power battery thermal management unit, reducing energy consumption, and also beneficial to improving the battery's endurance and service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural block diagram of the present invention;

[0021] Figure 2 It is a structural schematic diagram of the present invention;

[0022] Figure 3 The structure of the combined radiator of the present invention is schematically shown. Figure 1 ;

[0023] Figure 4 The structure of the combined radiator of the present invention is schematically shown. Figure 2 ;

[0024] Figure 5 It is a structural schematic diagram of the high-voltage fan motor of the present invention;

[0025] Figure 6 This is a schematic diagram of the layout of the power battery thermal management system, combined radiator and power compartment cover of the present invention;

[0026] In the figure, 1 is the intercooler radiator; 2 is the water radiator; 3 is the sub-radiator three; 31 is the water pump three; 32 is the controller three; 33 is the diverter valve three; 34 is the high-pressure fan motor one; 35 is the high-pressure fan motor two; 36 is the high-pressure fan motor three; 4 is the hydraulic radiator; 5 is the sub-radiator two; 51 is the water pump two; 52 is the controller two; 53 is the diverter valve two; 54 is the hydraulic oil pump motor one; 55 is the hydraulic oil pump motor two; 6 is the sub-radiator one; 61 is the water pump one; 62 is the controller one; 63 is the diverter valve one; 64 is the milling drive motor; 65 is the range-extending generator; 7 is the combined radiator; 8 is the expansion water tank two; 9 is the expansion water tank one; 10 is the fan; 11 is the engine compartment cover; 111 is the air outlet; 112 is the air inlet. DETAILED DESCRIPTION

[0027] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0028] The hybrid milling machine cooling system of the present invention includes an engine water cooling system, an engine intercooler cooling system, a hydraulic cooling system and a motor electronic control cooling system, is equipped with at least one fan 10 driven by a high-pressure fan motor, and is equipped with a power battery thermal management system. The power battery thermal management system is arranged as a whole in the cold air side area of ​​the ventilation area required by the engine water cooling system, the engine intercooler cooling system, the hydraulic cooling system and the motor electronic control cooling system; the motor electronic control cooling system includes a milling drive motor and range extender generator cooling subsystem, a hydraulic oil pump motor cooling subsystem and a fan drive motor cooling subsystem; the milling drive motor and range extender generator cooling subsystem includes a sub-radiator 16, a water pump 161, a controller 162, a milling drive motor 64, a range extender generator 65 and pipelines connected in sequence; the hydraulic oil pump motor cooling subsystem includes a water pump 2 51, a controller 2 52, a diverter valve 2 53, at least one hydraulic oil pump motor and pipelines connected in sequence; the fan drive motor cooling subsystem includes a sub-radiator 3 3, a water pump 3 31, a controller 3 32, at least one high-pressure fan motor and pipelines connected in sequence.

[0029] The engine water cooling system of the present invention includes a water radiator 2, an intercooler cooling system including an intercooler radiator 1, a hydraulic cooling system including a hydraulic radiator 4, and a motor electronic control cooling system including a sub-radiator 1 6, a sub-radiator 2 5, and a sub-radiator 3 3 arranged in parallel. The intercooler radiator 1, water radiator 2, sub-radiator 3 3, hydraulic radiator 4, sub-radiator 2 5, and sub-radiator 1 6 form a combined radiator 7. Sub-radiators 1 6, 2 5, and 3 3 are not arranged adjacent to the intercooler radiator 1. The engine water cooling system is equipped with an expansion tank 1 9. The subsystems of the motor electronic control cooling system share expansion tank 2 8 for heat dissipation. Water pump 1 61, water pump 2 51, and water pump 3 31 have the same specifications.

[0030] The milling drive motor and range-extender generator cooling subsystem of the present invention comprises a milling drive motor 64 and a range-extender generator 65 arranged in parallel. Controller 1 62 is a two-in-one controller capable of independently controlling the milling drive motor 64 and the range-extender generator 65. A diverter valve 1 63 is provided between controller 1 62 and the milling drive motor 64. Controller 2 52 of the hydraulic oil pump motor cooling subsystem is an all-in-one controller capable of independently controlling at least one of hydraulic oil pump motor 1 54 and hydraulic oil pump motor 2 55. If there are more than one hydraulic oil pump motor, they are arranged in parallel, with a diverter valve 2 53 provided between controller 2 52 and the hydraulic oil pump motors. Controller 3 32 of the fan drive motor cooling subsystem is an all-in-one controller capable of independently controlling at least one of high-pressure fan motor 1 34, high-pressure fan motor 2 35, and high-pressure fan motor 3 36. If there are more than one high-pressure fan motor, they are arranged in parallel, with a diverter valve 33 provided between controller 3 32 and the high-pressure fan motors. The high-voltage fan motor 1 34 , the high-voltage fan motor 2 35 , and the high-voltage fan motor 3 36 are water-cooled structures, and the voltage is a DC voltage greater than 600V.

[0031] The combined radiator 7 of the present invention is located in the upper rear area of ​​the engine compartment hood 11 and has an air outlet 111 corresponding thereto. The power battery thermal management system is located below the combined radiator 7, and an air inlet 112 is provided at the rear of the engine compartment hood 11. The flow rates of water pumps 1 61, 2 51, and 31 can be independently adjusted based on the temperature of each heat dissipating component. When the temperature is high, the flow rate increases, while when it is low, the flow rate decreases. The speed of fan 11 can also be independently controlled based on the heat dissipation of each heat dissipating component. When the temperature is high, the speed increases, while when it is low, the speed decreases.

[0032] like Figure 1 The hybrid milling machine cooling system of the present invention includes an engine water cooling system, an engine intercooler cooling system, a hydraulic cooling system and a motor electronic control cooling system, and is equipped with a power battery thermal management system; the motor electronic control cooling system includes a milling drive motor and range extender generator cooling subsystem, a hydraulic oil pump motor cooling subsystem and a fan drive motor cooling subsystem.

[0033] like Figure 2 The engine water cooling system includes a water radiator 2, the engine intercooler cooling system includes an intercooler radiator 1, the hydraulic cooling system includes a hydraulic radiator 4, and the motor electronic control cooling system includes sub-radiators 1 6, 2 5, and 3 3, which are arranged in parallel to form a combined radiator 7. Combined radiator 7 is equipped with at least one fan 10 driven by a high-voltage fan motor 7. Because the heat dissipation required by each component radiator is large, the number of fans required is large, and the corresponding fan drive power is high, which is difficult to meet with conventional low-voltage 24V motors. Therefore, a high-voltage fan motor with a DC voltage of >600V is configured, and it is water-cooled.

[0034] like Figure 3 、 Figure 4 、 Figure 5 , showing the engine water cooling system, engine intercooler cooling system, hydraulic cooling system, motor electronic control cooling system, and power battery thermal management system. The milling drive motor and range extender generator cooling subsystem includes, in sequence, a sub-radiator 6, a water pump 61, a controller 62, a milling drive motor 64, a range extender generator 65, and piping. The hydraulic oil pump motor cooling subsystem includes, in sequence, a sub-radiator 5, a water pump 51, a controller 52, at least one hydraulic oil pump motor, and piping. The fan drive motor cooling subsystem includes, in sequence, a sub-radiator 3, a water pump 31, a controller 32, at least one fan motor, and piping.

[0035] like Figure 6 The power battery thermal management system is arranged as a whole in the cold air side area of ​​the ventilation areas required by the engine water cooling system, engine intercooler cooling system, hydraulic cooling system, and motor electronic control cooling system. Specifically, the combined radiator 7 is located in the upper area of ​​the rear of the power compartment hood 11 and has a corresponding air outlet 111. The relevant components of the power battery thermal management system are located below the combined radiator 7, and the rear of the power compartment hood 11 is provided with an air inlet 112. When the entire machine is working, the cold air passes through the air inlet 112 - power battery thermal management system - high-voltage fan motor - fan 10 - combined radiator 7 - air outlet 111 in sequence. The power batteries in the power battery thermal management system are always in an environment with a temperature substantially the same as the ambient temperature, which is beneficial to the heat dissipation of the power batteries and also reduces the energy consumption of the power battery thermal management unit to a certain extent.

[0036] Because the motor and electronic control water temperature requirement is generally below 65°C, or even below 55°C, and the intercooler radiator 1 has a relatively high inlet temperature, to minimize its impact on the motor and electronic control's cooling, the radiators are arranged so that none of the sub-radiators 1 (6), 2 (5), and 3 (3) included in the motor and electronic control cooling system are adjacent to the intercooler radiator 1 of the engine intercooler cooling system. To minimize the impact of the water radiator 2 on the motor and electronic control's cooling, the engine water cooling system and the motor and electronic control cooling system are equipped with independent expansion tanks: expansion tank 1 (9) and expansion tank 2 (8), respectively. Expansion tank 2 (8) is shared by all subsystems of the motor and electronic control cooling system.

[0037] The cooling subsystems of the milling drive motor and range-extended generator, the cooling subsystem of the hydraulic oil pump motor, and the cooling subsystem of the fan drive motor of the present invention are independent of each other and can be independently controlled for cooling according to the operating conditions. Compared with the cooling system with a matching single-fan structure, the fan speed can be individually controlled according to the cooling requirements of components involved in different areas, thereby effectively reducing energy consumption and noise. The power battery is arranged on the cold air side, which is beneficial to reducing the burden on the power battery thermal management unit, reducing energy consumption, and also beneficial to improving the battery's endurance and service life.

Claims

1. A hybrid milling machine heat dissipation system, characterized by: The invention comprises an engine water cooling system, an engine intercooling cooling system, a hydraulic cooling system and an electric motor electronic control cooling system, and is provided with at least one fan (10) driven by a high-voltage fan motor, and is provided with a power battery thermal management system, wherein the power battery thermal management system is arranged as a whole in the cold air side area of ​​the ventilation area required by the engine water cooling system, the engine intercooling cooling system, the hydraulic cooling system and the electric motor electronic control cooling system; the electric motor electronic control cooling system comprises a milling drive motor and a range extender generator cooling subsystem, a hydraulic oil pump motor cooling subsystem and a fan drive motor cooling subsystem; the milling drive motor and the range extender generator cooling subsystem, the hydraulic oil pump motor cooling subsystem and the ... and the range extender generator and the range extender generator and the range extender generator and the range extender generator and the range extender generator and the range extender generator and the range extender generator and the range extender generator and the range extender generator and the range extender generator and the range extender generator and the range extender generator and the range extender generator and the range extender generator and the range extender generator and The planer drive motor and range extender generator heat dissipation subsystem comprises a sub-radiator 1 (6), a water pump 1 (61), a controller 1 (62), a milling drive motor (64), a range extender generator (65) and pipelines connected in sequence; the hydraulic oil pump motor heat dissipation subsystem comprises a water pump 2 (51), a controller 2 (52), a diverter valve 2 (53), at least one hydraulic oil pump motor and pipelines connected in sequence; the fan drive motor heat dissipation subsystem comprises a sub-radiator 3 (3), a water pump 3 (31), a controller 3 (32), at least one high-pressure fan motor and pipelines connected in sequence.

2. The hybrid milling machine heat dissipation system according to claim 1, characterized in that: The engine water cooling system includes a water cooling radiator (2), the engine intercooling cooling system includes an intercooling radiator (1), the hydraulic cooling system includes a hydraulic radiator (4), and the motor electronic control cooling system includes a sub-radiator 1 (6), a sub-radiator 2 (5), and a sub-radiator 3 (3) arranged in parallel; the intercooling radiator (1), the water cooling radiator (2), the sub-radiator 3 (3), the hydraulic radiator (4), the sub-radiator 2 (5), and the sub-radiator 1 (6) form a combined radiator (7).

3. The hybrid milling machine heat dissipation system according to claim 2, characterized in that: The sub-radiator 1 (6), sub-radiator 2 (5) and sub-radiator 3 (3) are not arranged adjacent to the intercooler radiator (1).

4. The hybrid milling machine heat dissipation system according to claim 1, characterized in that: The engine water cooling system is provided with an expansion water tank 1 (9), and the subsystems of the motor electronic control cooling system share the expansion water tank 2 (8) for heat dissipation; the specifications of the water pump 1 (61), water pump 2 (51) and water pump 3 (31) are the same.

5. The hybrid milling machine heat dissipation system according to claim 1, characterized in that: The milling drive motor (64) and the range-extending generator (65) of the milling drive motor and range-extending generator heat dissipation subsystem are arranged in parallel; the controller (62) is a two-in-one controller that can independently control the milling drive motor (64) and the range-extending generator (65); and a diverter valve (63) is provided between the controller (62) and the milling drive motor (64).

6. The hybrid milling machine heat dissipation system according to claim 1, characterized in that: The controller 2 (52) of the hydraulic oil pump motor heat dissipation subsystem is an all-in-one controller that can separately control at least one of the hydraulic oil pump motor 1 (54) and the hydraulic oil pump motor 2 (55). When there are more than one hydraulic oil pump motors, they are arranged in parallel, and a diverter valve 2 (53) is provided between the controller 2 (52) and the hydraulic oil pump motor.

7. The hybrid milling machine heat dissipation system according to claim 1, characterized in that: The controller three (32) of the fan drive motor heat dissipation subsystem is an all-in-one controller that can separately control at least one of the high-voltage fan motor one (34), the high-voltage fan motor two (35), and the high-voltage fan motor three (36). When there are more than one high-voltage fan motors, they are arranged in parallel, and a diverter valve three (33) is set between the controller three (32) and the high-voltage fan motors.

8. The hybrid milling machine heat dissipation system according to claim 7, characterized in that: The high-voltage fan motor 1 (34), the high-voltage fan motor 2 (35), and the high-voltage fan motor 3 (36) are water-cooled structures, and the voltage is a DC voltage and is greater than 600V.

9. The hybrid milling machine heat dissipation system according to claim 2, characterized in that: The combined radiator (7) is located in the upper rear area of ​​the power compartment cover (11) and has an air outlet (111) corresponding thereto; the power battery thermal management system is located below the combined radiator (7); and an air inlet (112) is provided at the rear of the power compartment cover (11).

10. The hybrid milling machine heat dissipation system according to claim 1, characterized in that: The flow rates of the water pump 1 (61), water pump 2 (51) and water pump 3 (31) are increased or decreased independently according to the temperature of each heat dissipation component. When the temperature is high, the flow rate increases, and vice versa.

11. The hybrid milling machine heat dissipation system according to claim 1, characterized in that: The rotation speed of the fan (11) is independently controlled according to the heat dissipation conditions of each heat dissipation component. When the temperature is high, the rotation speed increases, and vice versa.

12. A milling machine, characterized in that: A hybrid milling machine heat dissipation system using any one of claims 1-11.

Images