An oil circuit for cooling rotors of oil-cooled motors in non-road machinery vehicles

Abstract

This utility model relates to the field of cooling rotor oil circuit technology, and discloses an oil circuit for cooling rotors of oil-cooled motors in off-road machinery vehicles. The rotor oil circuit is composed of a motor shaft, a first balance plate, a second balance plate, and stacked rotor silicon steel sheets. The motor shaft has a first motor shaft oil inlet hole at its center near the rear end cover. The motor shaft has four evenly distributed small holes at the joint surface between the first balance plate and the stacked rotor silicon steel sheets. An oil groove is provided on the first balance plate opposite the four small holes, and an oil groove is also provided between the two V-shaped magnets on the stacked rotor silicon steel sheets opposite the oil groove. This oil circuit for cooling rotors of oil-cooled motors in off-road machinery vehicles allows oil to flow from one end of the rotor to the other, reducing the temperature of the rotor and magnets by more than 20%, thus preventing demagnetization of the magnets. Furthermore, the oil exiting from the oil holes can be splashed onto the stator to cool it.

Description

Technical Field

[0001] This utility model relates to the field of cooling rotor oil circuit technology, specifically to an oil circuit for cooling rotors of oil-cooled motors in non-road machinery vehicles. Background Technology

[0002] Currently, most off-road machinery vehicles on the market use water-cooled motors, with few using oil-cooled motors. These oil-cooled motors lack an oil cooling circuit for the rotor. Because the rotor cannot be cooled, its temperature is often higher than the stator's. Even when the stator temperature is suitable for operation, the rotor magnets demagnetize. To address this, a new oil-cooled motor with an oil-circuited rotor has been developed. This design utilizes an oil circuit formed by oil holes in the motor shaft and punched holes in the rotor laminations, which can reduce the rotor temperature by more than 20%, preventing magnet demagnetization. Therefore, there is an urgent need for an oil circuit for cooling the rotor of oil-cooled motors in off-road machinery vehicles to solve the aforementioned technical problems. Utility Model Content

[0003] The purpose of this invention is to provide an oil circuit for cooling rotors of oil-cooled motors in non-road machinery vehicles, in order to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] An oil circuit for cooling rotor of an oil-cooled motor in a non-road machinery vehicle is provided. The rotor oil circuit is composed of a motor shaft, a first balance plate, a second balance plate, and a rotor silicon steel sheet stack. The motor shaft has a first motor shaft oil inlet hole at the center near the rear end cover. The motor shaft has four evenly distributed small holes at the joint surface between the first balance plate and the rotor silicon steel sheet stack. An oil groove is provided on the first balance plate opposite the four small holes. An oil groove is provided between two V-shaped magnets on the rotor silicon steel sheet stack opposite the oil groove.

[0006] Preferably, a locking nut is installed between the first balance plate and the motor shaft.

[0007] Preferably, a cooling oil flow channel is provided at the lowest position of the rotor oil circuit.

[0008] Preferably, an oil injection hole is provided at the center of the rotor silicon steel sheet stack.

[0009] Preferably, the second balance plate, which is attached to the silicon steel sheet stack of the rotor, has a through round hole, which facilitates the flow of oil from the motor shaft along the small hole of the motor shaft, the oil groove of the first balance plate, the silicon steel sheet stack groove, and the round hole of the second balance plate.

[0010] Preferably, the motor shaft has a cylindrical structure.

[0011] Compared with existing technologies, this utility model, applied to the cooling rotor oil circuit of an oil-cooled motor in a non-road machinery vehicle, has the following beneficial effects: The oil flows from one end of the rotor to the other, reducing the cooling effect on the rotor and magnets, thereby lowering the rotor temperature by more than 20% and preventing demagnetization of the magnets. Furthermore, the oil exiting from the oil holes can be splashed onto the stator, cooling it as well. Attached Figure Description

[0012] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0013] Figure 1 This is an overall structural diagram of the oil circuit for cooling rotors of oil-cooled motors in non-road machinery vehicles, which is an application of this utility model.

[0014] Figure 2 for Figure 1 Sectional view at point AA;

[0015] Figure 3 for Figure 1 Sectional view at point BB;

[0016] Figure 4 for Figure 2 Sectional view at CC;

[0017] Figure 5 for Figure 1 Cooling oil flow diagram at point AA;

[0018] Figure 6 for Figure 1 Cooling oil flow diagram at point BB;

[0019] In the diagram: 1-Second balance plate; 2-Rotor silicon steel laminations; 3-First balance plate; 4-Locking nut; 5-Motor shaft; 6-Magnet; 7-Oil inlet hole of the first motor shaft; 8-Oil inlet hole of the second motor shaft; 9-Cooling oil flow channel; 10-Oil injection hole. Detailed Implementation

[0020] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings. In the embodiments of the present utility model, the different types of cross-sectional lines are not labeled according to national standards, nor do they specify material requirements for the components; they are used to distinguish the cross-sectional views of the components in the drawings.

[0021] Please see Figure 1-4An oil circuit for cooling rotor of an oil-cooled motor in a non-road machinery vehicle is provided. The rotor oil circuit is composed of a motor shaft 5, a first balance plate 3, a second balance plate 1, and a rotor silicon steel sheet stack 2. The motor shaft 5 has a first motor shaft oil inlet hole 7 at the center near the rear end cover. The motor shaft located at the joint surface between the first balance plate 3 and the rotor silicon steel sheet stack 2 has four evenly distributed small holes. The first balance plate 3 facing the four small holes has an oil groove. The rotor silicon steel sheet stack 2 facing the oil groove has an oil groove between the two V-shaped magnets 6.

[0022] Among them, a locking nut 4 is installed between the first balance plate 3 and the motor shaft 5.

[0023] Cooling oil flow channel 9 is provided at the lowest position of the rotor oil circuit.

[0024] Among them, an oil injection hole 10 is opened at the center of the rotor silicon steel lamination 2.

[0025] Among them, the second balance plate 1, which is attached to the rotor silicon steel sheet stack 2, is provided with a through round hole, so that the oil from the motor shaft 5 can flow out along the motor shaft hole, the oil groove of the first balance plate 3, the silicon steel sheet stack groove, and the round hole of the second balance plate 1.

[0026] Among them, the motor shaft 5 is a cylindrical structure.

[0027] It should be noted that the rotor oil circuit is composed of a motor shaft 5, a first balance plate 3, a second balance plate 1, and rotor silicon steel sheet laminations 2. The motor shaft 5 has a first motor shaft oil inlet 7 at its center near the rear end cover. The motor shaft, located at the joint surface between the first balance plate 3 and the silicon steel sheet, has four evenly distributed small holes. An oil groove is provided on the balance plate 1 opposite the four small holes. An oil groove is also provided between the two V-shaped magnets on the laminations opposite the oil grooves. The other balance plate 2, adjacent to the laminations, has a through-hole, allowing oil from the motor shaft to flow out along the small holes in the motor shaft, the oil grooves in the balance plate 1, the grooves in the silicon steel sheet laminations, and the through-hole in the balance plate 2. Figure 5 As indicated by the arrow. The rotor also has an oil groove near the front end of the cover, positioned at a 45-degree angle to the rear end. The cooling oil in the oil groove flows in the opposite direction. Figure 6 As indicated by the arrow.

[0028] The oil flows from one end of the rotor to the other, which reduces the temperature of the rotor and magnets, thereby reducing the temperature of the motor rotor by more than 20%, preventing the magnets from demagnetizing, and the oil coming out of the oil hole can also be thrown onto the stator to cool the stator.

[0029] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0030] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A cooling oil circuit for an oil-cooled motor rotor in a non-road machinery vehicle, the rotor oil circuit being composed of a motor shaft (5), a first balancing plate (3), a second balancing plate (1), and stacked silicon steel rotor laminations (2), characterized in that: The motor shaft (5) is provided with a first motor shaft oil inlet hole (7) at the center of the rear end cover. The motor shaft located at the joint surface of the first balance plate (3) and the rotor silicon steel sheet stack (2) is provided with 4 evenly distributed small holes. The first balance plate (3) facing the 4 small holes is provided with an oil groove. The rotor silicon steel sheet stack (2) facing the oil groove is provided with an oil groove between the two V-shaped magnets (6).

2. The oil circuit for cooling rotor of an oil-cooled motor in a non-road machinery vehicle according to claim 1, characterized in that: A locking nut (4) is installed between the first balance plate (3) and the motor shaft (5).

3. The oil circuit for cooling rotor of an oil-cooled motor in a non-road machinery vehicle according to claim 1, characterized in that: A cooling oil flow channel (9) is provided at the bottom of the rotor oil circuit.

4. The oil circuit for cooling rotor of an oil-cooled motor in a non-road machinery vehicle according to claim 1, characterized in that: An oil injection hole (10) is provided at the center of the rotor silicon steel lamination (2).

5. The oil circuit for cooling rotor of an oil-cooled motor in a non-road machinery vehicle according to claim 1, characterized in that: Another second balance plate (1) attached to the rotor silicon steel sheet stack (2) has a through round hole, which facilitates the flow of oil from the motor shaft (5) along the motor shaft hole, the oil groove of the first balance plate (3), the silicon steel sheet stack groove, and the round hole of the second balance plate (1).

6. The oil circuit for cooling rotor of an oil-cooled motor in a non-road machinery vehicle according to claim 1, characterized in that: The motor shaft (5) has a cylindrical structure.

Images