CN213817369U

CN213817369U - Rotor core and turbo generator with same

Info

Publication number: CN213817369U
Application number: CN202021738336.5U
Authority: CN
Inventors: 黄冠豪; 鲜青龙; 黎瑞涛; 吴俊濠; 杨骏
Original assignee: GUANGZHOU GUANGZHONG ENTERPRISE GROUP CORP
Current assignee: GUANGZHOU GUANGZHONG ENTERPRISE GROUP CORP
Priority date: 2020-08-19
Filing date: 2020-08-19
Publication date: 2021-07-27
Anticipated expiration: 2030-08-19

Abstract

The utility model provides a rotor core and have this rotor core's turbo generator, the side wall face that is formed by being located the rotor punching piece of same row even forms the concave-convex face, and the interval size between concave surface and the convex surface is for the difference between distance b and distance a, after the rule on the lateral wall of rotor punching piece, the clearance has between line and the aforementioned concave surface, this clearance is rotor core's heat dissipation space promptly, under the prerequisite of guaranteeing rotor core magnetic circuit and intensity, promote rotor core's heat-sinking capability and heat dissipation homogeneity by a wide margin, avoid rotor core local difference in temperature big and influence the operating efficiency of generator, guarantee that rotor core and have this rotor core's turbo generator operation is stable, prolong turbo generator's life by a wide margin.

Description

Rotor core and turbo generator with same

Technical Field

The utility model relates to a rotor core and have this rotor core's turbo generator.

Background

The rotor core is one of the key components of the turbonator, is one part of a magnetic circuit, has good magnetic conductivity, and is one of the main parts causing the temperature rise of the turbonator. In the conventional rotor core 101, distances from a central line 104 between the side walls of the opposite slots 103 on two adjacent rotor sheets 102 to the side walls of the rotor sheets 102 on two sides of the rotor core are equal, so that a single rotor sheet 102 forms a symmetrical structure, after a plurality of rotor cores 101 are laminated and connected into a whole along the axial direction, the side walls of the plurality of rotor sheets 102 in the same row are butted to form a side plane, when a lead is wound on the side plane, no heat dissipation distance exists between the lead and the side plane, as shown in fig. 1, when a steam turbine generator operates, the rotor core inside the steam turbine generator generates magnetic circuit loss and heat loss, the losses are converted into heat energy, the temperature of the steam turbine generator is increased, and the surface of the rotor core is aged due to overhigh temperature, so that the working efficiency and the operation safety of the steam turbine generator are affected. In order to reduce the loss generated in the turbonator, improve a cooling system and increase the heat dissipation capacity of the turbonator to limit the temperature rise of the turbonator, the method is one of the main problems in the development of the turbonator.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a simple structure, heat-sinking capability height, the reliable and stable rotor core of operation and have this rotor core's turbo generator to promote generator life.

A rotor core, rotor punching including a plurality of intervals setting, be provided with first cell body on the double-phase relative lateral wall of free end one side of rotor punching respectively, central line between the relative first cell body lateral wall is for an apart from one side rotor punching lateral wall distance on two adjacent rotor punching is a, and is b apart from opposite side rotor punching lateral wall distance, and b > an or b < a.

A turbo generator with this rotor core, including a plurality of above-mentioned rotor cores, a plurality of rotor cores are folded along the axial and are pressed and become an organic whole, wherein have at least a rotor core with opposite face and adjacent rotor core butt joint for after the butt joint is accomplished, form the corrugated surface by the lateral wall face that is located one row with the rotor punching piece and becomes, and the interval size between concave surface and the convex surface is for the difference between distance b and distance a.

The utility model relates to a rotor core and turbo generator with the same, because the distance between the central line between the opposite first groove side walls on two adjacent rotor punching sheets on the rotor core is a and the distance between the central line and the side wall of the rotor punching sheet on the other side is b, and b is more than a or b is less than a, the single rotor punching sheet forms an asymmetric structure, therefore, when a plurality of rotor cores are laminated and connected into a whole along the axial direction, at least one of the rotor cores is butted with the adjacent rotor core by the opposite surface, thereby after the butt joint is completed, the side wall surface connected by the rotor punching sheets in the same row forms a concave-convex surface, the distance between the concave surface and the convex surface is the difference between the distance b and the distance a, after the line is embedded on the side wall of the rotor, a gap is provided between the line and the concave surface, the gap is the heat dissipation space of the rotor core, under the prerequisite of guaranteeing rotor core magnetic circuit and intensity, promote rotor core's heat-sinking capability and heat dissipation homogeneity by a wide margin, avoid rotor core local difference in temperature big and influence turbo generator's operating efficiency, guarantee that rotor core and the turbo generator who has this rotor core operate stably, prolong turbo generator's life by a wide margin.

Drawings

Fig. 1 is a schematic view of a conventional rotor core structure.

Fig. 2 is a schematic view of the rotor core structure of the present invention.

Fig. 3 is a schematic structural view of the present invention after a plurality of rotor cores are laminated into a whole.

Fig. 4 is a front view of fig. 3.

Fig. 5 is a top view of the rotor plate of fig. 4 in a row.

FIG. 6 is a partially enlarged view of the wire-insertion state of the present invention.

Detailed Description

A rotor core comprises a plurality of rotor punching sheets 1 arranged at intervals, wherein first groove bodies 2 are respectively arranged on two opposite side walls on one side of the free end of each rotor punching sheet 1, the distance from a central line 3 between the side walls of the first groove bodies 2 opposite to each other on two adjacent rotor punching sheets 1 to the side wall of the rotor punching sheet 1 on one side is a, the distance from the side wall of the rotor punching sheet 1 on the other side is b, and b is greater than a or b is less than a. As shown in fig. 2, a distance c from a center line 3 between the side walls of the first slot bodies 2 opposite to each other on two adjacent rotor sheets 1 to the side wall of the first slot body 2 is provided. Wherein, the values of a and b are determined by calculation according to the actual magnetic circuit, and the calculation method is the prior art.

The rotor core 4 comprises an annular body, a plurality of groups of rotor punching sheet groups are arranged on the annular body at intervals, and each group of rotor punching sheet group comprises a plurality of rotor punching sheets 1 arranged at intervals. In this embodiment, four sets of rotor punching sheet are provided.

The side wall of the annular body of the rotor punching sheet 1 facing the first position and the last position in each rotor punching sheet group is provided with a second groove body 5 opposite to the first groove body 2 on the corresponding rotor punching sheet 1, the distance between the side wall of the first groove body 2 and the side wall of the second groove body 5 is a corresponding to the distance between the side wall of the rotor punching sheet 1 and the center line 3, and the distance from the side wall of the annular body is b, and b is more than a or less than a.

A plurality of assembling holes 6 are formed in the annular body, so that the annular body is convenient to assemble.

A positioning groove 7 is arranged on the side wall of the inner through hole of the annular body.

A steam turbine generator with the rotor core 4, as shown in fig. 3 to 6, includes a plurality of the rotor cores 4, the plurality of the rotor cores 4 are laminated and connected into a whole along the axial direction, wherein at least one of the rotor cores 4 is butted with the adjacent rotor core 4 by the opposite surface, so that after the butting is completed, the side wall surface formed by connecting the rotor sheets 1 in the same row forms a concave-convex surface, and the distance between the concave surface 8 and the convex surface 9 is the difference between the distance b and the distance a. In this embodiment, four rotor cores 4 are stacked and connected into a whole along the axial direction, and meanwhile, adjacent rotor cores 4 are butted with opposite surfaces, so that the concave-convex surfaces formed on the side wall surfaces connected by the rotor sheets 1 in the same row can be in a structure in which the concave surfaces 8 and the convex surfaces 9 appear alternately, and then a plurality of heat dissipation spaces can be formed on the side wall surfaces connected by the rotor sheets 1 in the same row, thereby further improving the heat dissipation performance of the rotor cores 4, enabling the heat dissipation to be more uniform, further ensuring the operation stability of the rotor cores 4 and prolonging the service life of the turbonator.

Claims

1. The utility model provides a rotor core, includes rotor punching (1) that a plurality of intervals set up, be provided with first cell body (2), its characterized in that on the double-phase relative lateral wall of free end one side of rotor punching (1) respectively: the distance between a central line (3) between the side walls of the first groove bodies (2) opposite to each other on the two adjacent rotor punching sheets (1) and the side wall of the rotor punching sheet (1) on one side is a, the distance between the central line and the side wall of the rotor punching sheet (1) on the other side is b, and b is greater than a or b is less than a.

2. A rotor core according to claim 1, characterized in that: the rotor core (4) comprises an annular body, a plurality of groups of rotor punching sheet groups are arranged on the annular body at intervals, and each group of rotor punching sheet group comprises a plurality of rotor punching sheets (1) arranged at intervals.

3. A rotor core according to claim 2, characterized in that: a plurality of mounting holes (6) are provided in the annular body.

4. A rotor core according to claim 3, characterized in that: and a positioning groove (7) is arranged on the side wall of the inner through hole of the annular body.

5. A turbonator characterized by: the rotor core comprises a plurality of rotor cores (4) as claimed in any one of claims 1 to 4, the plurality of rotor cores (4) are laminated and connected into a whole along the axial direction, wherein at least one rotor core (4) is butted with the adjacent rotor core (4) by the opposite surface, so that after the butting is completed, the concave and convex surfaces are formed by the side wall surfaces connected by the rotor punching sheets (1) in the same row, and the distance between the concave surface (8) and the convex surface (9) is the difference between the distance b and the distance a.

6. The turbine generator of claim 5, wherein: the adjacent rotor cores (4) are butted with each other by opposite surfaces, so that concave-convex surfaces formed by the side wall surfaces connected by the rotor sheets (1) in the same row are in a structure that concave surfaces (8) and convex surfaces (9) alternately appear.

7. The turbine generator of claim 6, wherein: the number of the rotor iron cores (4) is four, and the four rotor iron cores (4) are laminated and connected into a whole along the axial direction.