Large horizontal energy-saving and material-reducing stator structure

Abstract

A large horizontal energy-saving and material-reducing stator structure comprises a stator base, a stator core and a stator winding, the stator core is fixed on the stator base, the stator winding is wound on the stator core, two ends of the stator base are respectively provided with a left end cover and a right end cover, the left end cover is provided with a plurality of cooling mechanisms, and the right end cover is provided with a plurality of cooling mechanisms. An air inlet of the cooling mechanism faces the left end face of the stator core, and an air outlet of the cooling mechanism faces the left end face of the rotor. Hot air is cooled by the cooling mechanism to form cold air, and the cold air circularly cools the whole motor through the rotor center body, the rotor interpoles, the stator coil, the stator iron core and the stator base, so that long-term effective operation of a unit is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of motors, and particularly relates to a large horizontal energy-saving and material-reducing stator structure. Background Art

[0002] A motor generally refers to a device that converts mechanical energy into electrical energy or electrical energy into mechanical energy, and is widely used in the fields of industry, furniture, and transportation. According to the different rotation axes, motors are mainly divided into two categories: horizontal-axis motors and vertical-axis motors.

[0003] The internal structure of a motor is complex and mainly consists of a stator, a rotor, and complex electrical components. The stator is composed of a frame and a core with windings. The core is formed by punching slots in silicon steel sheets and laminating them. It is the magnetic circuit of the motor and plays a role in fixing and supporting the windings. Windings are installed in the core slots. When alternating current is applied to the three-phase stator windings of the motor, a rotating magnetic field will be generated. This rotating magnetic field cuts the rotor windings, thereby generating an induced current in the rotor windings. The current-carrying rotor conductors will generate an electromagnetic force under the action of the stator rotating magnetic field, thereby forming an electromagnetic torque on the motor shaft and driving the motor to rotate.

[0004] The direct-drive motor system involved in the project is applied to the multi-degree-of-freedom loading test of the generator nacelle, with a rated power of 20 MW and a speed of 5.4 rpm. It is a three-phase AC salient-pole ultra-low-speed giant horizontal motor. The existing stator frame usually adopts the structure of left and right flange plates and an intermediate ring to fix the stator core, and an external cooling system is arranged at the top or bottom of the unit. In this way, the axial dimension of the stator structure is relatively long. To meet the requirements of the frame's rigidity and strength, the material consumption of the frame significantly increases, and moreover, with the external cooling system, the cooling effect is not good. Summary of the Invention

[0005] To solve the above problems existing in the current technology, the utility model provides a large horizontal energy-saving and material-reducing stator structure with good cooling effect and capable of ensuring the reliable operation of the unit.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A large horizontal energy-saving and material-reducing stator structure includes a stator frame, a stator core, and stator windings. The stator core is fixed on the stator frame, the stator windings are wound around the stator core, left and right end covers are respectively installed at both ends of the stator frame, several cooling mechanisms are arranged on the left end cover, the air inlet of the cooling mechanism faces the left end face of the stator core, and the air outlet of the cooling mechanism faces the left end face of the rotor. The hot air of the utility model is cooled by the cooling mechanism to form cold air, and the cold air circulates through the rotor central body, rotor interpolar regions, stator coils, stator core, and stator frame to cool the entire motor, thereby ensuring the long-term and effective operation of the unit.

[0008] Further, the cooling mechanism includes an air cooler and a fan. The air cooler and the fan are connected through an air duct. The air cooler is installed at the air inlet position, and the fan is installed at the air outlet position.

[0009] Further, both the air cooler and the air duct are installed on the outer side of the left end cover.

[0010] Further, the fan is installed on the inner side of the left end cover.

[0011] Further, foundation support structures are provided on both sides and the bottom of the stator frame. The reliable operation of the unit can be ensured through three-point support.

[0012] Further, the stator frame adopts a large-tooth pressing plate structure, canceling the left and right flange plates of the conventional unit. A large-tooth pressing plate with high rigidity and an increased pressing tooth structure are used to tightly press the stator core. The stiffness of the frame meets the force and deformation requirements under various loading conditions.

[0013] Further, the stator core is laminated from high-quality silicon steel sheets 50WW310.

[0014] Further, the stator core is fixedly connected to the stator frame through a dove-tail structure, so that the stator core can float up and down.

[0015] Further, the stator core, the stator frame, and the large-tooth pressing plate are tightly pressed through insulated through bolts.

[0016] Further, the stator winding is made by the VPI (Vacuum Pressure Impregnation) method, making the main insulation a dense and uniform solid, without air bubbles and with a smooth surface without defects.

[0017] The beneficial effects of the present utility model are: good cooling effect and the reliable operation of the unit can be ensured. Description of the Drawings

[0018] Figure 1 It is a schematic cross-sectional view of the layout structure of the present utility model.

[0019] Figure 2 It is a schematic diagram of the stator cross-sectional structure of the present utility model.

[0020] In the figure: 1. Stator frame; 2. Stator core; 3. Stator winding; 4. Right end cover; 5. Rotor; 6. Left end cover; 7. Air cooler; 8. Air duct; 9. Fan; 10. Foundation support structure. Detailed Embodiments

[0021] The present utility model will be further described below in conjunction with specific embodiments, but the present utility model is not limited to these specific embodiments. Those skilled in the art should recognize that the present utility model covers all alternative solutions, improvement solutions, and equivalent solutions that may be included within the scope of the claims.

[0022] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model 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 thus should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more, unless otherwise clearly defined.

[0023] In the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected to", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0024] In the present utility model, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over", and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath", and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0025] See Figure 1 、 Figure 2, this embodiment provides a large horizontal energy-saving and material-saving stator structure, including a stator frame 1, a stator core 2, and a stator winding 3. The stator core 2 is fixed on the stator frame 1, and the stator winding 3 is wound around the stator core 2. Left end covers 6 and right end covers 4 are respectively installed at both ends of the stator frame 1. A plurality of cooling mechanisms are annularly arranged on the left end cover 6. The air inlet of the cooling mechanism faces the left end face of the stator core 2, and the air outlet of the cooling mechanism faces the left end face of the rotor 5. The hot air of the present utility model is cooled by the cooling mechanism to form cold air, and the cold air circulates through the rotor central body, between the rotor poles, the stator coil, the stator core, and the stator frame to cool the entire motor, thereby ensuring the long-term and effective operation of the unit.

[0026] The cooling mechanism in this embodiment includes an air cooler 7 and a fan 9. The air cooler 7 and the fan 9 are connected through an air duct 8. The air cooler 7 is installed at the air inlet position, and the fan 9 is installed at the air outlet position. Specifically, both the air cooler 7 and the air duct 8 are installed outside the left end cover 6. The fan 9 is installed inside the left end cover 6.

[0027] In this embodiment, foundation support structures 10 are provided on both sides and the bottom of the stator frame 1. The reliable operation of the unit can be ensured through three-point support. The stator frame 1 adopts a large tooth pressing plate structure, cancels the left and right flange plates of conventional units, and uses a large tooth pressing plate with high rigidity to increase the pressing tooth structure to press the stator core 2. The rigidity of the frame meets the force and deformation requirements under various force conditions.

[0028] The stator core 2 in this embodiment is laminated from high-quality silicon steel sheets 50WW310. The stator core 2 is fixedly connected to the stator frame 1 through a dove-tail structure, so that the stator core 2 can float up and down. The stator core 2, the stator frame 1, and the large tooth pressing plate are tightened by insulating through bolts. The stator winding 3 is made by the VPI vacuum pressure impregnation method, making the main insulation a dense and uniform solid, without air bubbles and with a smooth surface without defects.

[0029] The present utility model has good cooling effect and can ensure the reliable operation of the unit, and can be widely used in large horizontal motors.

Claims

1. A large horizontal energy-saving and material-reducing stator structure, comprising a stator frame, a stator core, and a stator winding, wherein the stator core is fixed on the stator frame, the stator winding is wound on the stator core, and a left end cover and a right end cover are respectively installed at both ends of the stator frame, characterized in that: The left end cover is provided with a plurality of cooling mechanisms, the air inlets of the cooling mechanisms are arranged facing the left end surface of the stator core, and the air outlets of the cooling mechanisms are arranged facing the left end surface of the rotor.

2. A large horizontal energy-saving and material-reducing stator structure according to claim 1, characterized in that: The cooling mechanism comprises an air cooler and a fan, the air cooler and the fan are connected through an air duct, the air cooler is installed at the air inlet position, and the fan is installed at the air outlet position.

3. A large horizontal energy-saving and material-reducing stator structure according to claim 2, characterized in that: The air cooler and the air duct are both installed on the outside of the left end cover.

4. A large horizontal energy-saving and material-reducing stator structure according to claim 3, characterized in that: The fan is installed on the inner side of the left end cover.

5. The large horizontal energy-saving and material-reducing stator structure according to claim 1 is characterized in that: Both sides and the bottom of the stator frame are provided with basic support structures.

6. A large-scale horizontal energy-saving and material-reducing stator structure according to claim 1, characterized in that: The stator frame adopts a large-tooth pressure plate structure.

7. The large horizontal energy-saving and material-reducing stator structure according to claim 1 is characterized in that: The stator core is made of high-quality silicon steel sheets 50WW310 laminated together.

8. The large horizontal energy-saving and material-reducing stator structure according to claim 1 is characterized in that: The stator core is fixedly connected to the stator frame via a dove tail structure.

9. The large-scale horizontal energy-saving and material-reducing stator structure according to claim 1 is characterized in that: The stator core, the stator base and the large-tooth pressure plate are pressed together by insulating through-hole screws.

10. The large horizontal energy-saving and material-reducing stator structure according to claim 1, characterized in that: The stator winding is made by VPI vacuum pressure impregnation method.

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