Cast iron alternating-current generator winding supporting structure

Abstract

The utility model provides a cast iron AC generator winding support structure, which relates to the AC generator winding field, and comprises a motor winding and an installation assembly, the motor winding comprises a stator iron core, a rotor iron core and a coil embedded in the stator iron core, the outer wall of the stator iron core is provided with ventilation slots at equal intervals, and the rotor iron core is provided with a plurality of ventilation holes. Heat conduction holes are formed in the inner sides of the ventilation grooves, heat conduction rings are arranged in the heat conduction holes, heat conduction plates are arranged in the heat conduction holes, heat conduction fins are connected to the outer sides of the heat conduction plates, the installation assemblies are arranged at the two ends of the motor winding, the installation assemblies comprise inner flanges fixed to the two ends of the stator iron core, and outer flanges are arranged on the outer sides of the inner flanges. And a spring is arranged between the inner flange and the outer flange. According to the utility model, the problems of bolt looseness and stator winding heat dissipation deviation of the support structure related to the existing generator winding are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of alternator windings, and particularly relates to a support structure for a cast iron alternator winding. Background Art

[0002] Due to the existence of tangential electromagnetic force, the motor can perform electromechanical energy conversion. For a synchronous motor, when the stator and rotor magnetic fields of the motor rotate synchronously, in addition to the tangential electromagnetic force, there is also a radial electromagnetic force. The radial electromagnetic force is the main factor causing vibration and noise of the motor. When the motor is in a special operating condition, not only the stator core, stator winding and end structure parts will be affected by the radial electromagnetic force, but also the rotor pole coil will be subjected to a huge radial electromagnetic force, thereby generating great stress on the rotor pole coil and its related components. In severe cases, it may cause damage to the pole coil and its related components, and then cause huge losses. After retrieval, in the prior art (publication number: CN217469600U), it is recorded that "a support structure for a generator pole coil includes a main pole support plate, a secondary pole support plate, an upper support block, a lower support block, an upper locking bolt and a lower locking bolt. The secondary pole support plate is arranged between the main pole support plate and the pole core. The secondary pole support plate includes an insulating plate and a bottom steel plate. The bottom steel plate is fixedly arranged with the main pole support plate. One end of the upper support block abuts against the main pole support plate of the generator, and the other end is stuck at the bottom of the T-tail groove of the generator pole. The upper locking bolt is fixed at the T-tail end of the generator pole. One end of the lower support block abuts against the main pole support plate of the generator, and the other end abuts against the brake ring of the generator. It is fixed on the pole stop block of the generator with a lower locking bolt and a stop washer. The utility model minimizes the mechanical damage of the radial electromagnetic force to the pole support plate and other components, has a simple and practical structure, and improves the use efficiency and service life of the generator."

[0003] Although the support structure of the generator winding in the prior art realizes the stable fixation of the winding, there are still some deficiencies: the existing support structure related to the generator winding only fixes and supports the winding body, that is, including the stator winding and the rotor winding. The stator winding and the rotor winding include the stator core and the rotor core, as well as the copper wire coils embedded therein. Therefore, the core is also a part of the support structure. However, the existing stator core is tightly fixed to the motor housing, resulting in poor heat dissipation effect. Secondly, the stator winding is generally fixed to its housing through flanges and bolts, resulting in the loosening of the bolts. Summary of the Utility Model

[0004] In order to overcome the defects existing in the prior art, the present utility model provides a support structure for a cast iron alternator winding to solve the problems of bolt loosening in the existing support structure related to the generator winding and poor heat dissipation of the stator winding.

[0005] To achieve the above object, a support structure for a cast iron alternator winding is provided, including: an electric machine winding and a mounting assembly. The electric machine winding includes a stator core and a rotor core, as well as coils embedded therein. Ventilation grooves are equidistantly formed on the outer wall of the stator core, heat conduction holes are formed inside the ventilation grooves, and heat conduction rings are arranged inside the heat conduction holes. Heat conduction plates are arranged inside the heat conduction holes, and heat conduction fins are connected to the outer sides of the heat conduction plates. The mounting assembly is arranged at both ends of the electric machine winding, and the mounting assembly includes an inner flange fixed to both ends of the stator core, an outer flange is arranged outside the inner flange, and a spring is arranged between the inner flange and the outer flange.

[0006] Furthermore, the ventilation grooves and the heat conduction holes are axially formed along the stator core, and stator slot embedding grooves are axially formed on the inner wall of the stator core.

[0007] Furthermore, the heat conduction ring is inserted into the heat conduction hole through heat conduction silicone grease, and the heat conduction plate is fixedly arranged in the heat conduction ring in a cross structure.

[0008] Furthermore, the inner ends of the heat conduction fins are connected to the outer wall of the heat conduction ring, and the outer ends of the heat conduction fins are flush with the outer ring wall of the stator core.

[0009] Furthermore, a shaft hole is formed in the center of the rotor core, and rotor slot embedding grooves are formed on the periphery of the shaft hole.

[0010] Furthermore, the inner flange and the outer flange are of the same size, and the outer flange and the inner flange are connected by long bolts, and the spring is sleeved outside the long bolts.

[0011] Furthermore, the outer flange is located inside the generator housing, the long bolts are inserted into the outer flange through through holes formed in the generator housing, and the inner ends of the long bolts are connected to threaded holes formed around the inner flange.

[0012] The beneficial effects of the present utility model are as follows:

[0013] 1. When the entire electric machine winding is installed, first place the whole of it inside the generator housing, then pass the outer flange through the core shaft at the center of the rotor core, then pass the long bolts through the end covers at both ends of the generator housing, then sequentially through the through holes around the outer flange and the spring, and finally screw them into the threaded holes of the inner flange until the end covers are pressed against both ends of the generator housing. At this time, the spring is deformed under the extrusion of the end cover and the outer flange, so that it has a reverse elastic effect on the long bolts, thereby reducing the loosening phenomenon of the bolts caused by the vibration of the generator during use and strengthening the installation support stability of the electric machine winding;

[0014] 2. By using the stator slot for embedding coils in the stator core and the rotor slot for embedding coils in the rotor core, it is convenient to wind and fix the coils stably. Then, through the heat conduction holes opened inside the stator core, the heat conduction rings and heat conduction plates arranged inside the heat conduction holes, and the heat conduction fins arranged outside the heat conduction holes, the heat generated during the operation of the stator winding is transferred to the outside. Then, the core shaft drives the fan to blow air into the ventilation slots, so that the air flow passing through the ventilation slots takes away the surrounding heat, improving the heat dissipation effect of the motor winding. Description of the Drawings

[0015] Figure 1 Schematic diagram of the installation structure of the motor winding according to an embodiment of the present invention.

[0016] Figure 2 Schematic perspective view of the motor winding according to an embodiment of the present invention.

[0017] Figure 3 Schematic perspective view of the stator core according to an embodiment of the present invention.

[0018] Figure 4 Schematic partial sectional view of the stator core according to an embodiment of the present invention.

[0019] In the figure: 1. Motor winding; 11. Stator core; 111. Ventilation slot; 112. Heat conduction hole; 113. Stator slot for embedding coils; 114. Heat conduction ring; 115. Heat conduction plate; 116. Heat conduction fin; 12. Rotor core; 121. Rotor slot for embedding coils; 122. Shaft hole; 2. Installation component; 21. Inner flange; 22. Outer flange; 23. Spring; 24. Long bolt. Detailed Embodiment

[0020] Refer to Figures 1 to 4 As shown, the present invention provides a support structure for a cast iron AC generator winding, including: a motor winding 1 and an installation component 2. The motor winding 1 includes a stator core 11 and a rotor core 12, and coils embedded therein. Ventilation slots 111 are equidistantly opened on the outer wall of the stator core 11, heat conduction holes 112 are opened inside the ventilation slots 111, a heat conduction ring 114 is arranged inside the heat conduction holes 112, a heat conduction plate 115 is arranged inside the heat conduction holes 112, and heat conduction fins 116 are connected to the outside of the heat conduction plate 115. The installation component 2 is arranged at both ends of the motor winding 1, and the installation component 2 includes an inner flange 21 fixed to both ends of the stator core 11, an outer flange 22 is arranged outside the inner flange 21, and a spring 23 is arranged between the inner flange 21 and the outer flange 22.

[0021] In this embodiment, the motor winding 1 and the mounting assembly 2 constitute the cast iron alternator winding support structure involved in this application. Among them, the motor winding 1 is fixedly supported through the mounting assembly 2, and the coil is fixedly supported through the stator core 11 and the rotor core 12 included in the motor winding 1, thereby jointly realizing the support structure of the motor winding 1.

[0022] Specifically, one end of the core shaft inside the rotor core 12 is connected with a fan, and the other end extends outward to the outside of the generator housing, and the rotor core 12 rotates freely relative to the stator core 11.

[0023] As Figure 2 、 Figure 3 and Figure 4 shown, the ventilation grooves 111 and the heat conduction holes 112 are opened along the axial direction of the stator core 11. At the same time, stator slot embedding grooves 113 are axially opened on the inner wall of the stator core 11. The heat conduction ring 114 is inserted into the heat conduction holes 112 through heat conductive silicone grease, and the heat conduction plate 115 is fixed in the heat conduction ring 114 in a cross structure. The inner end of the heat conduction fin 116 is connected to the outer wall of the heat conduction ring 114, and the outer end of the heat conduction fin 116 is flush with the outer ring wall of the stator core 11. An axial hole 122 is opened in the center of the rotor core 12, and rotor slot embedding grooves 121 are opened on the outer periphery of the axial hole 122.

[0024] Specifically, the heat conduction ring 114 is designed as a cylindrical structure, and the heat conduction plate 115 and the heat conduction fins 116 are both made of heat conductive metal materials.

[0025] Among them, the heat conduction fins 116 are designed as a fan-shaped arrangement structure, so as to increase the contact area with the outer wall of the stator core 11 and improve the heat dissipation efficiency.

[0026] As Figure 1 shown, the inner flange 21 and the outer flange 22 are designed to have the same size, and the outer flange 22 and the inner flange 21 are connected by long bolts 24. And the spring 23 is sleeved on the outside of the long bolts 24. The outer flange 22 is located inside the generator housing, and the long bolts 24 are inserted into the outer flange 22 through the through holes opened in the generator housing, and the inner ends of the long bolts 24 are connected to the threaded holes opened around the inner flange 21.

[0027] Specifically, during installation, the long bolts 24 pass through the end cover of the generator housing and the outer flange 22, and the spring 23, and then are screwed to the inner flange 21 inwardly. And the screwing depth is such that the spring 23 is in a compressed state, and the end cover of the housing is squeezed and fixed at the end position of the housing.

[0028] During use, when the entire motor winding is installed, first place it entirely inside the generator housing. Then, pass the outer flange through the core shaft at the center of the rotor core. Next, pass long bolts through the end covers at both ends of the generator housing, then successively through the through holes and springs around the outer flange, and finally screw them into the threaded holes of the inner flange until the end covers are tightly pressed against both ends of the generator housing. At this time, the spring is deformed under the extrusion of the end cover and the outer flange, exerting an elastic reaction on the long bolts in the reverse direction. Thus, during use, the loosening of the bolts caused by the vibration of the generator is reduced, strengthening the installation support stability of the motor winding. By using the stator slot openings provided in the stator core and the rotor slot openings provided in the rotor core, it is convenient to stably wind and fix the coils. Then, through the heat conduction holes provided inside the stator core, the heat conduction rings and heat conduction plates provided inside the heat conduction holes, and the heat conduction fins provided outside the heat conduction holes, the heat generated by the operation of the stator winding is transferred to the outside. Then, the core shaft drives the fan to blow air into the ventilation slots, so that the airflow flowing through the ventilation slots takes away the surrounding heat, improving the heat dissipation effect of the motor winding.

[0029] The support structure for the cast iron AC generator winding of the present utility model can effectively solve the problems that the existing support structure for the generator winding has bolt loosening and poor heat dissipation of the stator winding. Based on the existing technology of the support structure for the cast iron AC generator winding, it avoids the bolt loosening problem in the existing support structure for the generator winding and enhances the heat dissipation effect of the stator winding.

Claims

1. A support structure for a cast iron alternator winding, comprising: Motor winding (1) and mounting assembly (2), characterized in that: the motor winding (1) includes a stator core (11) and a rotor core (12), and coils embedded therein. Ventilation grooves (111) are equidistantly arranged on the outer wall of the stator core (11), heat conduction holes (112) are arranged inside the ventilation grooves (111), a heat conduction ring (114) is arranged inside the heat conduction holes (112), a heat conduction plate (115) is arranged inside the heat conduction holes (112), and heat conduction fins (116) are connected to the outer side of the heat conduction plate (115). The mounting assembly (2) is arranged at both ends of the motor winding (1), and the mounting assembly (2) includes an inner flange (21) fixed to both ends of the stator core (11), an outer flange (22) is arranged outside the inner flange (21), and a spring (23) is arranged between the inner flange (21) and the outer flange (22).

2. The support structure of a cast iron alternator winding according to claim 1, characterized in that, The ventilation grooves (111) and the heat conduction holes (112) are arranged along the axial direction of the stator core (11), and stator slot embedding grooves (113) are axially arranged on the inner wall of the stator core (11).

3. A cast iron AC generator winding support structure according to claim 1, characterized in that, The heat conduction ring (114) is inserted into the heat conduction hole (112) through heat conduction silicone grease, and the heat conduction plate (115) is fixed in the heat conduction ring (114) in a cross structure.

4. A cast iron AC generator winding support structure according to claim 1, characterized in that, The inner end of the heat conduction fin (116) is connected to the outer wall of the heat conduction ring (114), and the outer end of the heat conduction fin (116) is flush with the outer ring wall of the stator core (11).

5. The supporting structure of a cast iron alternator winding according to claim 1, characterized in that A shaft hole (122) is opened in the center of the rotor core (12), and rotor slot embedding grooves (121) are opened on the outer periphery of the shaft hole (122).

6. The supporting structure of a cast iron alternator winding according to claim 1, wherein, The inner flange (21) and the outer flange (22) are set to have the same size, and the outer flange (22) and the inner flange (21) are connected by long bolts (24), and the spring (23) is sleeved outside the long bolts (24).

7. A cast iron AC generator winding support structure according to claim 1, characterized in that, The outer flange (22) is located inside the generator housing, and the long bolts (24) are inserted into the outer flange (22) through through holes opened in the generator housing, and the inner ends of the long bolts (24) are connected to threaded holes opened around the inner flange (21).

Images