CN215580846U

CN215580846U - Cast-aluminum rotor silicon steel sheet and rotor adopting same

Info

Publication number: CN215580846U
Application number: CN202121279840.8U
Authority: CN
Inventors: 关暘; 梁太海; 吴永干; 常新建; 牟廷超; 朱颂恩
Original assignee: Suzhou Energy Electric Co ltd
Current assignee: Suzhou Energy Electric Co ltd
Priority date: 2021-06-08
Filing date: 2021-06-08
Publication date: 2022-01-18
Anticipated expiration: 2031-06-08

Abstract

The utility model relates to a cast-aluminum rotor silicon steel sheet and a rotor adopting the same, wherein the cast-aluminum rotor silicon steel sheet comprises a circular plate sheet-shaped body, a rotating shaft hole is formed in the center of the body, a plurality of cast-aluminum holes are uniformly distributed on the body in the circumferential direction by taking the rotating shaft hole as the center, grooves corresponding to the cast-aluminum holes one by one are formed in the outer edge of the body, and insulating layers are coated on the side surfaces of two sides of the body. The rotor adopting the silicon steel sheet comprises a rotating shaft, wherein an iron core is sleeved on the rotating shaft, the iron core is formed by laminating a large number of silicon steel sheets layer by layer, cast aluminum holes in each silicon steel sheet are opposite to each other, a plurality of through holes penetrating through the iron core are formed in the iron core, a guide bar is arranged in each through hole, two ends of the iron core are respectively connected with conductive end rings, two ends of each guide bar respectively extend out of the through holes to be electrically connected with the conductive end rings, and the two conductive end rings are tightly pressed at two ends of the iron core by the aid of tension of each guide bar on the two conductive end rings.

Description

Cast-aluminum rotor silicon steel sheet and rotor adopting same

Technical Field

The utility model relates to a cast-aluminum rotor silicon steel sheet and a rotor adopting the same.

Background

The cast aluminum rotor is commonly called a squirrel-cage rotor and comprises a rotating shaft, an iron core, guide bars cast in the iron core and conductive end rings cast at two ends of the iron core, a plurality of grooves which are uniformly distributed in the circumferential direction and extend in the axial direction are usually formed in the outer wall of the iron core, the guide bars are embedded in the grooves in a one-to-one correspondence mode, the outer side of each guide bar is flush with the outer circumferential surface of the iron core, the iron core is composed of a large number of silicon steel sheets which are mutually insulated and laminated together, the guide bars easily cause the short circuit phenomenon of the outer edges of the silicon steel sheets, so that a harmonic magnetic field in an air gap easily causes stray loss on the surface of the rotor, and meanwhile, the guide bars are too close to a fixed stator, eddy currents are also easily induced on the guide bars, and loss is formed.

SUMMERY OF THE UTILITY MODEL

The utility model firstly solves the technical problems that: provided is a cast-aluminum rotor silicon steel sheet, the outer edges of which do not generate mutual short circuit when the silicon steel sheets are laminated layer by layer.

In order to solve the technical problems, the utility model adopts the technical scheme that: cast aluminium rotor silicon steel sheet, including the circular slab sheet body, the pivot hole has been seted up at the body center, still uses the pivot hole to have a plurality of cast aluminium holes as central circumference equipartition on the body, and the body outer fringe is provided with the recess with cast aluminium hole one-to-one, and body both sides side all coats and has the insulating layer.

Preferably, the cast aluminum hole is fan-shaped, the extension lines of two straight edges of the cast aluminum hole pass through the center of the body, and two arc-shaped edges of the cast aluminum hole are concentric with the outer circumference of the body.

As an optimal scheme, the bottom edge of the groove is an arc edge concentric with the outer circle of the body, an arc barrier strip with constant width is formed between the groove and the corresponding cast aluminum hole, and the width of the barrier strip is 0.3 mm-1 mm.

The utility model solves the technical problems that: a rotor is provided which has extremely low stray losses due to harmonics, thereby improving motor temperature rise and motor efficiency.

In order to solve the technical problems, the utility model adopts the technical scheme that: the utility model provides a rotor, includes the pivot, cup joint the iron core in the pivot, this iron core is laminated layer upon layer by a large amount of foretell silicon steel sheet and is formed, and the cast aluminium hole on every silicon steel sheet is all just right each other, forms many through-holes that run through the iron core on the iron core, is provided with a conducting bar in every through-hole, and the iron core both ends are connected with the electrically conductive end links respectively, and the through-hole is stretched out respectively and electrically connected with the electrically conductive end links at the both ends of each conducting bar, and the pulling force of each conducting bar to two electrically conductive end links makes two electrically conductive end links sticis at the iron core both ends.

As a preferred scheme, the guide bars are suspended in the through holes and are separated from the edges of the cast aluminum holes of the silicon steel sheets.

The utility model has the beneficial effects that: according to the cast-aluminum rotor silicon steel sheet, the cast-aluminum holes and the grooves are formed, so that the guide bars cast in the cast-aluminum holes are far away from the outer edge of the silicon steel sheet, and the phenomenon that the outer edge of the silicon steel sheet is short-circuited by the guide bars when the silicon steel sheet is laminated layer by layer is eliminated. The rotor of the utility model adopts the silicon steel sheets, so that the guide bars are positioned in the through holes formed by connecting a large number of cast aluminum holes, and the guide bars and the outer edges of the silicon steel sheets are blocked by the blocking bars, thereby avoiding the short circuit phenomenon of the silicon steel sheets positioned at the outer edges. The method for manufacturing the rotor by adopting the silicon steel sheets ensures that the guide bars are far away from the outer edge of the iron core by limiting the turning depth of the outer edge of the rotor, and also ensures that the guide bars cannot cause the short circuit phenomenon that the silicon steel sheets are positioned at the outer edge. On the basis that short circuit does not appear in the part that is located the outer fringe between each silicon steel sheet, just can effectively reduce the iron core outer fringe and receive the vortex that the harmonic magnetic field in the air gap induced to a great extent reduces the stray loss that arouses by the harmonic magnetic field, and then improves motor temperature rise problem, improves motor efficiency.

Drawings

The following detailed description of embodiments of the utility model is provided in conjunction with the appended drawings, in which:

fig. 1 is a front view of a silicon steel sheet;

fig. 2 is a side view of a silicon steel sheet;

FIG. 3 is a half-sectional view of the rotor of the present invention;

in FIGS. 1 to 3: 1. silicon steel sheet, 101, body, 102, rotating shaft hole, 103, cast aluminum hole, 104, groove, 105, insulating layer, 106, stop bar, 2, rotating shaft, 3, iron core, 4, through hole, 5, conducting bar, 6 and conducting end ring.

Detailed Description

Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Example 1:

as shown in fig. 1 and 2, the cast aluminum rotor silicon steel sheet 1 according to the present invention includes a circular plate-shaped body 101, a rotating shaft hole 102 is formed in the center of the body 101, a plurality of cast aluminum holes 103 are circumferentially and uniformly distributed on the body 101 with the rotating shaft hole 102 as a center, grooves 104 corresponding to the cast aluminum holes 103 are formed in the outer edge of the body 101, and insulating layers 105 are coated on the side surfaces of both sides of the body 101.

In this embodiment, the cast aluminum hole 103 is fan-shaped, the extension lines of two straight sides of the cast aluminum hole 103 pass through the center of the body 101, and two arc-shaped sides of the cast aluminum hole 103 are concentric with the outer circumference of the body 101. The bottom edge of the groove 104 is an arc edge concentric with the outer circle of the body 101, an arc barrier strip 106 with constant width is formed between the groove 104 and the corresponding cast aluminum hole 103, and the width of the barrier strip 106 is 0.3 mm-1 mm.

In practical production, the specific shape of the cast aluminum hole 103 is not particularly limited, and may be rectangular, trapezoidal, circular, triangular, oval, and other irregular shapes, and the shape of the stop strip 106 may vary according to the shape of the cast aluminum hole 103, for example, when the cast aluminum hole 103 is rectangular or trapezoidal, the stop strip 106 is rectangular and straight.

The working principle of the embodiment is as follows: the cast-aluminum rotor silicon steel sheet 1 is provided with the cast-aluminum hole 103 and the groove 104, so that the conducting bars cast in the cast-aluminum hole 103 are far away from the outer edge of the silicon steel sheet 1, and the phenomenon that the outer edge of the silicon steel sheet 1 is short-circuited by the conducting bars when the silicon steel sheet 1 is laminated layer by layer is eliminated. Thereby effectively reducing the eddy current induced by the harmonic magnetic field in the air gap on the outer edge of the iron core made of the silicon steel sheet 1, reducing the stray loss caused by the harmonic magnetic field, further improving the problem of the temperature rise of the motor and improving the efficiency of the motor.

Example 2:

a rotor as shown in fig. 3, includes a rotating shaft 2, an iron core 3 is sleeved on the rotating shaft 2, the iron core 3 is formed by laminating a large number of silicon steel sheets 1 according to embodiment 1 layer by layer, cast aluminum holes 103 on each silicon steel sheet 1 are all right opposite to each other, a plurality of through holes 4 penetrating through the iron core 3 are formed on the iron core 3, a conducting bar 5 is arranged in each through hole 4, two ends of the iron core 3 are respectively connected with a conducting end ring 6, two ends of each conducting bar 5 respectively extend out of the through holes 4 to be electrically connected with the conducting end rings 6, and the two conducting end rings 6 are tightly pressed at two ends of the iron core 3 by the tensile force of each conducting bar 5 to the two conducting end rings 6. The conducting bars 5 are suspended in the through holes 4 and are separated from the edges of the cast aluminum holes 103 of the silicon steel sheets 1.

The working principle of the embodiment is as follows: the rotor of the utility model adopts the silicon steel sheets 1, so that the guide bars 5 are positioned in the through holes 4 formed by connecting a large number of cast aluminum holes 103, the guide bars 5 and the outer edges of the silicon steel sheets 1 are blocked by the blocking bars 106, and the short circuit phenomenon of the silicon steel sheets 1 positioned at the outer edges can not be caused. Thereby effectively reducing the eddy current induced by the harmonic magnetic field in the air gap on the outer edge of the iron core made of the silicon steel sheet 1, reducing the stray loss caused by the harmonic magnetic field, further improving the problem of the temperature rise of the motor and improving the efficiency of the motor.

The above embodiments are merely illustrative of the principles and effects of the present invention, and some embodiments in use, and are not intended to limit the utility model; it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications belong to the protection scope of the present invention.

Claims

1. Cast aluminium rotor silicon steel sheet (1), including circular plate sheet body (101), pivot hole (102) have been seted up at body (101) center, its characterized in that still uses pivot hole (102) to be the central circumference equipartition on body (101) to have a plurality of cast aluminium holes (103), and body (101) outer fringe is provided with recess (104) with cast aluminium hole (103) one-to-one, and body (101) both sides side all coats and has insulating layer (105).

2. The cast aluminum rotor silicon steel sheet according to claim 1, wherein the cast aluminum holes (103) are fan-shaped, extension lines of two straight sides of the cast aluminum holes (103) pass through the center of the body (101), and two arc sides of the cast aluminum holes (103) are concentric with the outer circumference of the body (101).

3. The cast-aluminum rotor silicon steel sheet as claimed in claim 1, wherein the bottom edge of the groove (104) is an arc edge concentric with the outer circle of the body (101), an arc-shaped barrier strip (106) with constant width is formed between the groove (104) and the corresponding cast-aluminum hole (103), and the width of the barrier strip (106) is 0.3 mm-1 mm.

4. The rotor comprises a rotating shaft (2) and is characterized in that an iron core (3) is sleeved on the rotating shaft (2), the iron core (3) is formed by laminating a large number of silicon steel sheets (1) according to any one of claims 1 to 3 layer by layer, cast aluminum holes (103) in each silicon steel sheet (1) are opposite to each other, a plurality of through holes (4) penetrating through the iron core (3) are formed in the iron core (3), a conducting bar (5) is arranged in each through hole (4), two ends of the iron core (3) are respectively connected with conductive end rings (6), two ends of each conducting bar (5) respectively extend out of the through holes (4) to be electrically connected with the conductive end rings (6), and the two conductive end rings (6) are tightly pressed at two ends of the iron core (3) by the aid of the tensile force of each conducting bar (5) for the two conductive end rings (6).

5. The rotor as recited in claim 4, characterized in that the bars (5) are suspended in the through holes (4) and are separated from the edges of the cast aluminum holes (103) of each silicon steel sheet (1).