A cooling system for the power motor of a new energy special vehicle for road cleaning

Abstract

This utility model discloses a cooling system for the superstructure motor of a new energy special vehicle for road cleaning. It consists of a water pump, an expansion tank, cooling rigid pipes, and coolant. The water pump, superstructure motor, and expansion tank are located on the same side outside the clean water tank. The inlet and outlet of the cooling rigid pipes are connected to the superstructure motor and water pump, respectively. The middle of the cooling rigid pipes extends into the clean water tank and directly contacts the clean water inside. The outlet of the water pump is connected to the inlet of the superstructure motor. The expansion tank is connected to the cooling rigid pipes via a pipeline, providing coolant to the cooling rigid pipes. This utility model can reduce the number of components, lower costs, reduce the size and space occupied by the cooling system, reduce its volume, improve the heat dissipation efficiency of the cooling system, and improve the overall reliability of the cooling system. Furthermore, its simple structure makes it easy to install and has strong practicality.

Description

Technical Field

[0001] This utility model relates to the field of cooling system technology, specifically, to a cooling system for the power motor of a new energy special vehicle for road cleaning. Background Technology

[0002] Traditional road cleaning vehicles equipped with electric motors operate on the principle of converting electromagnetic energy into mechanical energy. During this energy conversion, some electromagnetic energy is converted into heat energy, and some mechanical energy is also converted into heat energy during the motor's mechanical operation. Therefore, when the self-heating capacity of the electric motor is insufficient to dissipate the heat it generates, an additional cooling system is required to provide heat dissipation.

[0003] Currently, the most common cooling system is an independent cooling system, consisting of a radiator, water pump, electric fan, cooling pipes, expansion tank, and coolant. The coolant circulates to transfer heat from the motor to the radiator, where it is dissipated by the electric fan. This cooling system is based on traditional vehicle chassis cooling systems, albeit in smaller sizes. However, this independent cooling system has many components, occupies a large space, is costly, has low cooling efficiency, and its reliability decreases after prolonged operation. Utility Model Content

[0004] The purpose of this utility model is to provide a cooling system for the power motor of a new energy special vehicle for road cleaning, which solves the technical problems of existing power motor cooling systems, such as having many parts, occupying a large space, having high cost, low heat dissipation efficiency, and reduced reliability after long-term operation.

[0005] The present invention solves the above problems through the following technical solution:

[0006] A cooling system for the motor of a new energy special vehicle for road cleaning comprises a water pump, an expansion tank, cooling pipes, and coolant. The water pump, motor, and expansion tank are located on the same side outside the clean water tank. The inlet and outlet of the cooling pipes are connected to the motor and water pump, respectively. The middle of the cooling pipes extends into the clean water tank and comes into direct contact with the clean water inside. The outlet of the water pump is connected to the inlet of the motor. The expansion tank is connected to the cooling pipes via a pipeline to provide coolant to the cooling pipes.

[0007] As a further improvement, the cooling tube is made of steel or aluminum.

[0008] As a further improvement, a rigid pipe placement bracket is welded to the bottom of the water tank, and the middle part of the cooling rigid pipe is fixedly placed on the rigid pipe placement bracket.

[0009] As a further improvement, the cooling rigid pipe is sealed and runs through the bottom of the clean water tank, and the part that directly contacts the clean water in the clean water tank is bent and arranged parallel to it.

[0010] As a further improvement, the side of the water tank is provided with two circular openings, through which cooling hard pipes are installed and sealed with sealing rings or sealant.

[0011] As a further improvement, a flange is installed at the junction of the cooling tube and the circular opening, and the flange is located inside the clean water tank. The flange is fixed to the side of the clean water tank by bolts.

[0012] As a further improvement, the superstructure power motor is fixed to the vehicle frame via a motor frame.

[0013] As a further improvement, the water pump is mounted on the motor frame.

[0014] As a further improvement, the expansion tank is mounted on a tank bracket, and the tank bracket is welded to the side of the clean water tank.

[0015] As a further improvement, the expansion tank is positioned higher than the upper-mounted power motor.

[0016] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0017] (1) This utility model can reduce the types of parts and reduce costs; reduce the size and space occupied by the cooling system and reduce volume; improve the heat dissipation efficiency of the cooling system; and improve the overall reliability of the cooling system.

[0018] (2) Moreover, the present invention has a simple structure and is easy to install, and has strong practicality. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the cooling system structure of the power motor on a new energy special vehicle for road cleaning, according to this utility model.

[0020] Figure 2 This is a schematic diagram of the installation of the upper-mounted power motor cooling system of this utility model;

[0021] Figure 3 This is a schematic diagram of the cooling system for the upper-mounted power motor of this utility model;

[0022] Figure 4 This is a schematic diagram of the existing superstructure power motor cooling system.

[0023] Reference numerals in the attached diagram: 1. Water pump; 2. Expansion tank; 3. Cooling rigid pipe; 4. Upper-mounted power motor; 5. Fresh water tank; 6. Electric fan; 7. Radiator. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] New energy special vehicles for road cleaning: These are special vehicles specifically used for cleaning and maintenance of urban roads, and their power source is new energy, using electric motors.

[0026] Upper structure power motor: refers to the electric motor installed on the upper part of the special vehicle chassis, specifically used to drive the working device or auxiliary system of the upper structure.

[0027] Clean water tank: The clean water tank is a sealed container used by sanitation vehicles such as water sprinkler trucks, sweeper trucks, and high-pressure cleaning trucks to store clean water for operations such as rinsing, dust suppression, and cleaning.

[0028] Cooling system: A system that dissipates the heat generated by the motor during operation to prevent insulation aging, magnet demagnetization, or efficiency reduction caused by excessive temperature.

[0029] Thermal conductivity: It is a physical quantity that measures the thermal energy conducted by a material, representing the amount of heat passing through a unit area per unit time under a unit temperature gradient.

[0030] Currently, all new energy special-purpose vehicles for road cleaning on the market are equipped with independent clean water tanks. These vehicles pump water from the tanks to clean the ground. The pumps are driven by the superstructure's motor, so the motor runs continuously during operation. It stops running when the clean water tank is empty. The clean water in the tank is added and used immediately, so the highest temperature in summer will not exceed 50 degrees Celsius. Furthermore, the thermal conductivity of air is only 0.026 W / (m·K) (at 20℃), while the thermal conductivity of water is approximately 0.6 W / (m·K) (at 20℃), making water 23 times more efficient at transferring heat than air. Therefore, utilizing the properties of the clean water in the vehicle's built-in tank for heat exchange with the superstructure's motor achieves heat dissipation, improves cooling efficiency, and eliminates the need for a traditional independent cooling system. This reduces the number of components, improves reliability, and ultimately reduces costs while increasing efficiency.

[0031] Example:

[0032] Combined with appendix Figure 1-3 As shown, a cooling system for the motor of a new energy special vehicle for road cleaning is used to dissipate the heat generated by the motor during operation, preventing insulation aging / magnetic demagnetization or efficiency reduction caused by excessive temperature.

[0033] The cooling system consists of:

[0034] like Figure 1 As shown, the cooling system consists of a water pump 1, an expansion tank 2, a cooling rigid pipe 3, and coolant. The water pump 1, the superstructure power motor 4, and the expansion tank 2 are located on the same side outside the clean water tank 5. The inlet and outlet of the cooling rigid pipe 3 are connected to the superstructure power motor 4 and the water pump 1, respectively. The middle part of the cooling rigid pipe is in direct contact with the clean water in the clean water tank. The outlet of the water pump is connected to the inlet of the superstructure power motor 4. The expansion tank 2 is connected to the cooling rigid pipe 3 through a pipeline to provide coolant to the cooling rigid pipe 3.

[0035] Except for the water pump and expansion tank, which are retained from the traditional cooling system, components such as... Figure 4 The radiator 7 and electric fan 6 are shown; the heat dissipation function of the radiator and electric fan is transferred to the cooling rigid pipe placed inside the fresh water tank; preferably, in this embodiment, the cooling rigid pipe is made of steel or aluminum. Heat exchange occurs between the coolant in the cooling rigid pipe and the water in the fresh water tank to reduce the temperature in the cooling rigid pipe. After the coolant in the cooling rigid pipe is cooled, it reaches the superstructure power motor to continue cooling the superstructure power motor.

[0036] like Figure 3 As shown, the cooling system uses a water pump 1 to extract the low-temperature coolant from the cooling hard pipe 3 and send it to the upper-mounted power motor 4. Through heat exchange with the upper-mounted power motor, the temperature of the upper-mounted power motor is reduced, preventing insulation aging / magnetic demagnetization or efficiency reduction caused by excessively high motor temperature. The heated coolant returns to the cooling hard pipe, where it directly contacts the clean water in the clean water tank, achieving heat exchange between the high-temperature coolant inside the pipe and the low-temperature water in the clean water tank, thereby reducing the coolant temperature. The low-temperature coolant exiting from the cooling hard pipe continues to return to the motor to cool it down and absorb heat, in a continuous cycle. The expansion tank replenishes the coolant circulating within the entire cooling system.

[0037] Preferably, the cooling rigid tube is sealed and runs through the bottom of the clear water tank 5, with the portion in direct contact with the clear water in the tank bent parallel to the bottom to increase the length of the cooling rigid tube and enhance the cooling effect. Two circular openings are provided on the side of the clear water tank, through which the cooling rigid tube passes. These openings must be sealed completely with sealing rings or sealant to prevent liquid leakage from the clear water tank.

[0038] Preferably, to further ensure cooling effect and installation stability, a rigid pipe support is welded to the bottom of the clear water tank 5, and the middle part of the cooling rigid pipe is fixedly placed on the rigid pipe support. Alternatively, the middle part of the cooling rigid pipe can be fixed to the rigid pipe support by pipe clamps, cable ties, or other installation methods to increase the contact area with water, thereby improving the cooling effect.

[0039] In an optional embodiment, a flange is also installed at the mating point between the cooling rigid pipe and the circular opening, and the flange is located inside the clean water tank. The flange is fixed to the side of the clean water tank by bolts; similarly, a sealing ring or sealant is used at the circular opening to ensure a complete seal.

[0040] The upper-body drive motor 4 is fixed to the vehicle frame via a motor frame; and for ease of installation, a small frame is provided on the motor frame for mounting the water pump. The expansion tank is mounted on a water tank bracket, which is welded to the side of the clean water tank; alternatively, threaded connections or other connection methods can be used. The expansion tank is bolted to the water tank bracket; however, the expansion tank can also be installed in other locations, either parallel or perpendicular to the ground, as long as it is higher than the upper-body drive motor.

[0041] This invention can achieve the following effects:

[0042] 1. Reduce the number of parts and components to lower costs:

[0043] Heat exchange is achieved by using water in the water tank of a road cleaning vehicle, eliminating the need for radiators and electric fans in traditional independent cooling systems, reducing the number of components and lowering the overall cost of the cooling system.

[0044] 2. Reduce the size and space occupied by the cooling system, and shrink its volume:

[0045] Heat sinks and electric fans are usually large in size. This invention eliminates the heat sink and electric fan of the traditional independent cooling system, thereby reducing the size and space occupied by the entire cooling system and reducing its volume.

[0046] 3. Improve the heat dissipation efficiency of the cooling system:

[0047] Traditional cooling systems use radiators to exchange heat with the air. This invention uses cooling rigid pipes to exchange heat with water in a clean water tank. The thermal conductivity of air is only 0.026 W / (m·K) (at 20℃), while the thermal conductivity of water is about 0.6 W / (m·K) (at 20℃). Water's heat transfer capacity is 23 times that of air, thereby improving the heat dissipation efficiency of the entire cooling system.

[0048] 4. Improved overall reliability of the cooling system:

[0049] This invention eliminates the radiator and electric fan of the traditional independent cooling system and adds a section of steel or aluminum pipe. The reliability of the added steel or aluminum pipe is much higher than that of the combination of radiator and electric fan, thereby improving the reliability of the entire cooling system compared to the traditional cooling system.

[0050] Although the present invention has been described herein with reference to illustrative embodiments, the above embodiments are merely preferred embodiments of the present invention, and the implementation of the present invention is not limited to the above embodiments. It should be understood that those skilled in the art can design many other modifications and implementations, which will fall within the scope and spirit of the principles disclosed in this application.

Claims

1. A road cleaning new energy special vehicle with an on-board power motor cooling system, characterized in that, It consists of a water pump, an expansion tank, cooling rigid pipes, and coolant. The water pump, the superstructure motor, and the expansion tank are located on the same side outside the clean water tank. The inlet and outlet of the cooling rigid pipe are connected to the superstructure motor and the water pump, respectively. The middle part of the cooling rigid pipe extends into the clean water tank and is in direct contact with the clean water in the tank. The outlet of the water pump is connected to the inlet of the superstructure motor. The expansion tank is connected to the cooling rigid pipes through a pipeline to provide coolant to the cooling rigid pipes.

2. The cooling system for the power motor of a road cleaning new energy special vehicle according to claim 1, characterized in that, The cooling tubes are made of steel or aluminum.

3. The cooling system for the power motor of a road cleaning new energy special vehicle according to claim 1, characterized in that, The bottom of the water tank is welded with a rigid pipe placement bracket, and the middle part of the cooling rigid pipe is fixedly placed on the rigid pipe placement bracket.

4. The cooling system for the power motor of a road cleaning new energy special vehicle according to any one of claims 1-3, characterized in that, The cooling rigid pipe is sealed and penetrates through the bottom of the clean water tank, and the part that directly contacts the clean water in the tank is bent and parallel to it.

5. The cooling system for the power motor of a road cleaning new energy special vehicle according to claim 4, characterized in that, The side of the water tank has two circular openings, through which cooling hard pipes are installed and sealed with sealing rings or sealant.

6. The cooling system for the power motor of a road cleaning new energy special vehicle according to claim 5, characterized in that, A flange is also installed at the junction of the cooling tube and the circular opening, and the flange is located inside the clean water tank. The flange is fixed to the side of the clean water tank by bolts.

7. The cooling system for the power motor of a new energy special vehicle for road cleaning according to claim 4, characterized in that, The superstructure power motor is fixed to the vehicle frame via a motor frame.

8. The cooling system for the power motor of a road cleaning new energy special vehicle according to claim 7, characterized in that, The water pump is mounted on the motor frame.

9. The cooling system for the power motor of a road cleaning new energy special vehicle according to claim 4, characterized in that, The expansion tank is installed on the tank bracket, and the tank bracket is welded to the side of the clean water tank.

10. The cooling system for the power motor of a new energy special vehicle for road cleaning according to claim 9, characterized in that, The expansion tank is positioned above the power motor of the upper structure.

Images