Oil-to-electricity mining truck double-stator main drive permanent magnet motor structure

Abstract

The invention discloses an oil-to-electricity mining truck double-stator main drive permanent magnet motor structure, which relates to the technical field of permanent magnet motors and comprises a base, a front end cover and a rear end cover are respectively arranged at two ends of the base, a main drive stator assembly and an auxiliary drive stator assembly are arranged on the inner wall of the base side by side, and the main drive stator assembly and the auxiliary drive stator assembly are connected in series; a main drive junction box and an auxiliary drive junction box are fixedly arranged on the outer wall of the machine base, a main drive stator assembly is led out from the front end cover and connected with the main drive junction box, and an auxiliary drive stator assembly is led out from the rear end cover and connected with the auxiliary drive junction box. According to the scheme, the radial length of the whole motor structure is shortened through the structure that the double stators and the double rotors are arranged side by side and matched, the length of the motor shaft is correspondingly reduced, meanwhile, the double stators are led out from the two end faces of the motor base respectively, the wiring space in the motor base is reduced, the size of the whole motor is reduced in the axial direction, and the cost is reduced. Therefore, the size of the motor structure is integrally reduced, and the motor structure is more compact.

Description

Technical Field

[0001] The invention relates to a double-stator main-drive permanent magnet motor structure of an oil-to-electric mining truck, belonging to the technical field of permanent magnet motors. Background Art

[0002] Traditional fuel engines emit a large amount of harmful gases and particulate matter, causing serious pollution to mines and the surrounding environment. At the same time, high fuel consumption also increases the operating costs of mines and reduces economic benefits. Many mining companies have begun to seek environmentally friendly alternative products to convert oil-to-electricity for mining vehicles.

[0003] The power transmission efficiency of electric motor drive is higher, which can better adapt to load changes, improve operating efficiency and reduce failure rate; electric drive mine cars can be combined with intelligent technologies such as Internet of Things and big data to realize remote control, automated operation and other functions. Electric energy is cheaper than fuel, which can reduce operating costs in the long run; electric mine cars have certain advantages in power output, and can provide smoother and stronger power, which helps to improve the quality and efficiency of operations. With the increasing demand for power output of electric mine cars, the number of traditional power units is far from meeting actual needs, and the multi-unit series connection method has gradually become a trend. Electric mine cars produce almost no exhaust gas and noise pollution, reduce tail gas emissions in mining areas, and protect the environment.

[0004] Without changing the structure of the entire vehicle, the drive motor cannot be made too long, the length direction of the motor needs to be limited, how to arrange the axial space of the rotor, and how to reduce the axial space of the terminal box output are the main problems currently faced. At the same time, in order to meet different vehicle operating conditions, how to achieve low-speed high torque and high-speed constant power output are also problems that need to be solved in this application. Summary of the invention

[0005] In view of the above-mentioned technical problems, the purpose of the present invention is to propose a double-stator main-drive permanent magnet motor structure for an oil-to-electric mining truck.

[0006] The technical solution of the present invention is achieved as follows: a double-stator main drive permanent magnet motor structure for an oil-to-electric mining truck, comprising:

[0007] A machine base, wherein a front end cover and a rear end cover are respectively arranged at both ends of the machine base, a main drive stator assembly and an auxiliary drive stator assembly are arranged side by side on the inner wall of the machine base, and the main drive stator assembly and the auxiliary drive stator assembly are arranged in series; a main drive junction box and an auxiliary drive junction box are fixedly arranged on the outer wall of the machine base, the main drive stator assembly is connected to the main drive junction box through the front end cover, and the auxiliary drive stator assembly is connected to the auxiliary drive junction box through the rear end cover;

[0008] The motor shaft is horizontally arranged in the machine base, and the front and rear ends of the motor shaft are respectively rotatably matched with the front cover and the rear cover, and the front end of the motor shaft extends out of the outside of the front cover; a main drive rotor assembly and an auxiliary drive rotor assembly are fixedly arranged on the motor shaft, and there is a gap between the main drive rotor assembly and the auxiliary drive rotor assembly, the main drive rotor assembly cooperates with the main drive stator assembly, and the auxiliary drive rotor assembly cooperates with the auxiliary drive stator assembly.

[0009] Preferably, a main drive rotary transformer and an auxiliary drive rotary transformer are fixedly mounted on the rear end cover of the motor, the main drive rotary transformer and the auxiliary drive rotary transformer are arranged in series and are used to feed back speed position signals of the main drive rotor assembly and the auxiliary drive rotor assembly to the controller respectively.

[0010] Preferably, a first bracket and a second bracket are fixedly provided on the motor shaft, the main drive rotor assembly is fixed to the motor shaft via the first bracket, and the auxiliary drive rotor assembly is fixed to the motor shaft via the second bracket.

[0011] Preferably, a first bearing is provided on the front end cover, and the front end of the motor shaft is rotatably engaged with the front end cover through the first bearing; a second bearing is provided on the rear end cover, and the rear end of the motor shaft is rotatably engaged with the rear end cover through the second bearing.

[0012] Preferably, the front end cover and the rear end cover are both made of aluminum alloy.

[0013] Preferably, the ends of the main drive stator assembly and the auxiliary drive stator assembly are both potted.

[0014] Preferably, an external spline structure is provided on one end of the motor shaft extending out of the front end cover.

[0015] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0016] 1. The structure of double stators and double rotors arranged side by side shortens the radial length of the entire motor structure, and the length of the motor shaft is correspondingly reduced. At the same time, the double stators are connected from the two end faces of the base, which reduces the wiring space in the base and reduces the volume of the entire motor from the axial direction, thereby reducing the volume of the motor structure as a whole and making the motor structure more compact.

[0017] 2. The series connection of the first motor unit and the second motor unit realizes large torque and constant power output of the entire motor; at the same time, since each motor unit has a small capacity, it is easier to select the controller, realizing a balanced design of the power of the two motor units, making the operation of the motor more economical. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0019] Attached Figure 1 This is a structural schematic diagram of a double-stator main-drive permanent magnet motor structure of an oil-to-electric mining truck according to the present invention;

[0020] Attached Figure 2 For attachment Figure 1 Enlarged view of point A in the middle.

[0021] In the figure: 1. base; 11. front end cover; 111. first bearing; 12. rear end cover; 121. main drive rotary transformer; 122. auxiliary drive rotary transformer; 123. second bearing; 13. main drive stator assembly; 14. auxiliary drive stator assembly; 15. main drive junction box; 16. auxiliary drive junction box; 2. motor shaft; 21. main drive rotor assembly; 22. auxiliary drive rotor assembly; 23. first bracket; 24. second bracket; 25. external spline structure. DETAILED DESCRIPTION

[0022] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0023] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "straight", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0024] In the description of the present invention, it should be noted that, 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 or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] As attached Figure 1-2 As shown, the oil-to-electric mining truck dual-stator main drive permanent magnet motor structure described in the present invention includes a machine base 1 and a motor shaft 2.

[0026] The two ends of the base 1 are respectively provided with a front cover 11 and a rear cover 12. In this embodiment, the front cover 11 and the rear cover 12 are both made of aluminum alloy. The high thermal conductivity of aluminum alloy is used to ensure the heat dissipation effect of the motor and extend the service life of the motor.

[0027] The motor shaft 2 is horizontally arranged in the base 1, and the front and rear ends of the motor shaft 2 are rotatably matched with the front end cover 11 and the rear end cover 12 respectively, and the front end of the motor shaft 2 extends out of the outside of the front end cover 11; in this embodiment, a first bearing 111 is provided on the front end cover 11, and the front end of the motor shaft 2 is rotatably matched with the front end cover 11 through the first bearing 111; a second bearing 123 is provided on the rear end cover 12, and the rear end of the motor shaft 2 is rotatably matched with the rear end cover 12 through the second bearing 123; an external spline structure 25 is provided on one end of the motor shaft 2 extending from the front end cover 11 to ensure stable output of the motor shaft 2.

[0028] A main drive stator assembly 13 and an auxiliary drive stator assembly 14 are arranged side by side on the inner wall of the base 1, and a main drive rotor assembly 21 and an auxiliary drive rotor assembly 22 are fixedly arranged on the motor shaft 2. Specifically, a first bracket 23 and a second bracket 24 are fixedly arranged on the motor shaft 2, the main drive rotor assembly 21 is fixed to the motor shaft 2 through the first bracket 23, and the auxiliary drive rotor assembly 22 is fixed to the motor shaft 2 through the second bracket 24.

[0029] The main drive rotor assembly 21 cooperates with the main drive stator assembly 13, and the auxiliary drive rotor assembly 22 cooperates with the auxiliary drive stator assembly 14. The main drive terminal box 15 and the auxiliary drive terminal box 16 are fixedly arranged on the outer wall of the base 1. The main drive stator assembly 13 is connected to the main drive terminal box 15 through the front cover 11, and the auxiliary drive stator assembly 14 is connected to the auxiliary drive terminal box 16 through the rear cover 12; wherein, the main drive terminal box 15 is used to connect the main drive stator assembly 13, and the auxiliary drive terminal box 16 is used to connect the auxiliary drive stator assembly 14. In this embodiment, the main drive terminal box 15 and the auxiliary drive terminal box 16 can be connected to a separate external controller to accurately control the motor.

[0030] By means of a structure in which double stators and double rotors are arranged side by side, the radial length of the entire motor structure can be shortened, and the length of the motor shaft 2 will be correspondingly reduced. At the same time, the double stators respectively output wires from the two end faces of the base 1, thereby reducing the wiring space in the base 1 and reducing the volume of the entire motor axially, thereby reducing the volume of the motor structure as a whole and making the motor structure more compact.

[0031] The main drive stator assembly 13 , the main drive rotor assembly 21 and the main drive terminal box 15 form a first motor unit, and the auxiliary drive stator assembly 14 , the auxiliary drive rotor assembly 22 and the auxiliary drive terminal box 16 form a second motor unit.

[0032] The main drive stator assembly 13 and the auxiliary drive stator assembly 14 are arranged in series; in this embodiment, specifically, the winding coil of the main drive stator assembly 13 and the winding coil of the auxiliary drive stator assembly 14 are connected in series, so that the first motor unit and the second motor unit are connected in series, thereby realizing high torque and constant power output of the entire motor; at the same time, since the capacity of each motor unit is small, it is easier to select a controller, realizing a balanced design of the power of the two motor units, making the operation of the motor more economical.

[0033] A main drive rotary transformer 121 and an auxiliary drive rotary transformer 122 are fixedly mounted on the rear end cover 12 of the motor. The main drive rotary transformer 121 and the auxiliary drive rotary transformer 122 are arranged in series and are used to feed back speed position signals of the main drive rotor assembly 21 and the auxiliary drive rotor assembly 22 to the controller respectively.

[0034] There is a gap between the main drive rotor assembly 21 and the auxiliary drive rotor assembly 22 to prevent the main drive rotor assembly 21 and the auxiliary drive rotor assembly 22 from interfering with each other when they rotate.

[0035] The ends of the main drive stator assembly 13 and the auxiliary drive stator assembly 14 are both potted. In this embodiment, specifically, the winding coil ends of the main drive stator assembly 13 and the winding coil ends of the auxiliary drive stator assembly 14 are potted to enhance the heat dissipation effect and improve the motor power density.

[0036] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it. They cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A double-stator main drive permanent magnet motor structure for an oil-to-electric mining truck, characterized in that: Include: A machine base (1), wherein two ends of the machine base (1) are respectively provided with a front end cover (11) and a rear end cover (12); a main drive stator assembly (13) and an auxiliary drive stator assembly (14) are arranged side by side on the inner wall of the machine base (1), and the main drive stator assembly (13) and the auxiliary drive stator assembly (14) are arranged in series; a main drive terminal box (15) and an auxiliary drive terminal box (16) are fixedly arranged on the outer wall of the machine base (1); the main drive stator assembly (13) is connected to the main drive terminal box (15) through the front end cover (11), and the auxiliary drive stator assembly (14) is connected to the auxiliary drive terminal box (16) through the rear end cover (12); A motor shaft (2), wherein the motor shaft (2) is horizontally arranged in a machine base (1), and the front and rear ends of the motor shaft (2) are respectively rotatably matched with a front cover (11) and a rear cover (12), and the front end of the motor shaft (2) extends out of the outside of the front cover (11); a main drive rotor assembly (21) and an auxiliary drive rotor assembly (22) are fixedly arranged on the motor shaft (2), a gap is provided between the main drive rotor assembly (21) and the auxiliary drive rotor assembly (22), the main drive rotor assembly (21) is matched with a main drive stator assembly (13), and the auxiliary drive rotor assembly (22) is matched with an auxiliary drive stator assembly (14).

2. According to claim 1, a dual-stator main drive permanent magnet motor structure for an oil-to-electric mining truck is characterized in that: A main drive rotary transformer (121) and an auxiliary drive rotary transformer (122) are fixedly arranged on the rear end cover (12) of the motor. The main drive rotary transformer (121) and the auxiliary drive rotary transformer (122) are arranged in series and are used to feed back speed position signals of the main drive rotor assembly (21) and the auxiliary drive rotor assembly (22) to the controller respectively.

3. According to claim 1, the double-stator main drive permanent magnet motor structure of the oil-to-electric mining truck is characterized by: A first bracket (23) and a second bracket (24) are fixedly arranged on the motor shaft (2); the main drive rotor assembly (21) is fixed to the motor shaft (2) via the first bracket (23); and the auxiliary drive rotor assembly (22) is fixed to the motor shaft (2) via the second bracket (24).

4. According to claim 1, the double-stator main drive permanent magnet motor structure of an oil-to-electric mining truck is characterized by: The front end cover (11) is provided with a first bearing (111), and the front end of the motor shaft (2) is rotationally engaged with the front end cover (11) via the first bearing (111); the rear end cover (12) is provided with a second bearing (123), and the rear end of the motor shaft (2) is rotationally engaged with the rear end cover (12) via the second bearing (123).

5. The oil-to-electric mining truck dual-stator main drive permanent magnet motor structure according to claim 1 or 4, characterized in that: The front end cover (11) and the rear end cover (12) are both made of aluminum alloy.

6. The oil-to-electric mining truck dual-stator main drive permanent magnet motor structure according to claim 1 is characterized by: The ends of the main drive stator assembly (13) and the auxiliary drive stator assembly (14) are both potted.

7. The oil-to-electric mining truck dual-stator main drive permanent magnet motor structure according to claim 1 is characterized by: An external spline structure (25) is provided on one end of the motor shaft (2) extending out of the front end cover (11).

Images