Cast-aluminum rotor for motor

Abstract

The utility model relates to a cast-aluminum rotor for a motor, which belongs to the technical field of cast-aluminum rotors and comprises a cast-aluminum rotor body, the cast-aluminum rotor body is formed by coaxially stacking and pressing a plurality of iron sheets, the iron sheets are of a circular structure, and a plurality of heat dissipation holes with water-drop-shaped sections are formed in the iron sheets. The cast-aluminum rotor has the beneficial effects that heat flow in the cast-aluminum rotor body can axially flow along the cast-aluminum rotor body in the high-speed rotation process through the arrangement of the water-drop-shaped heat dissipation holes, so that air flow in the iron sheets can be accelerated, and circumferential wind power can be generated on the peripheries of the iron sheets through the arrangement of the heat dissipation fins, so that the heat dissipation efficiency of the cast-aluminum rotor is improved. According to the cast-aluminum rotor body, the heat dissipation of the iron sheet is accelerated, the heat dissipation performance is further improved, the positioning grooves, the heat dissipation holes and the guide bar grooves are used in cooperation, the part in the iron sheet can be hollowed out, the overall weight of the cast-aluminum rotor body is reduced, the structural integrity of the iron sheet can be ensured, and then the starting torque of the cast-aluminum rotor body can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to cast aluminium rotor technical field especially relates to a cast aluminium rotor for motor. BACKGROUND

[0002] With the continuous improvement of the degree of electrification, the motor as the key device of energy conversion plays a vital role in various industries, the traditional core lamination type rotor due to the weight is big and the poor heat dissipation performance, gradually cannot satisfy the modern high -efficient energy -conserving requirement, in recent years, cast aluminium rotor because its light weight, low cost, production efficiency etc. Advantage has received extensive attention and development.

[0003] Through the search, China patent discloses a kind of cast aluminium rotor (grant announcement number CN202384863U), including the rotor body being equipped with cavity, first punching sheet is equipped in the cavity, at least two second punching sheets, the second punching sheet is located in the cavity below first punching sheet, first mark groove is equipped on the first punching sheet, second mark groove is equipped on each second punching sheet, the second mark groove is on the same straight line, first mark groove and all second mark groove are not on the same straight line;The patent technology can be first mark groove on the first punching sheet and second mark groove equipped on second punching sheet in the cavity of rotor body staggered arrangement, ensure the rotor structure, improve the use effect of rotor, improve motor work efficiency.

[0004] But the above-mentioned device still has some shortcomings in actual use, more obvious is that the cast aluminium rotor in current market is mostly used in small and medium-sized asynchronous motor, but there is still a large improvement space in improving starting torque, improving heat dissipation performance. INVENTION CONTENTS

[0005] In view of the above problems existing in the prior art, the main purpose of the utility model is to provide a kind of cast aluminium rotor for motor.

[0006] The technical scheme of the utility model is as follows: a kind of cast aluminium rotor for motor, including cast aluminium rotor body, the cast aluminium rotor body is by a plurality of iron sheet coaxial stacking pressurization, multiple the iron sheet is circular structure, the inside of the iron sheet is equipped with a plurality of heat dissipation holes with water drop shape section, multiple the heat dissipation hole is equidistantly arranged with the iron sheet center as the axis and along the circumferential direction, the outside of the iron sheet is welded with multiple cooling fins, multiple the cooling fin is equidistantly arranged along the circumferential direction.

[0007] By adopting the above technical scheme, through the setting of cooling fin, circumferential wind power can be generated at the outer periphery of iron sheet, to realize the purpose of accelerating the heat dissipation of iron sheet, further improve heat dissipation performance, and the cooperation of positioning groove, heat dissipation hole and bar groove can hollow out the part in iron sheet, to reduce the weight of cast aluminium rotor body as a whole.

[0008] As a preferred implementation, the inside of the iron sheet is provided with four positioning grooves, two of which are symmetrically arranged with the center of the iron sheet as the axis.

[0009] By adopting the above technical scheme, the overall weight of the iron sheet can be reduced through the arrangement of the positioning grooves.

[0010] As a preferred implementation, the inside of the iron sheet is provided with a plurality of guide strip grooves, which are arranged between the two positioning grooves, and the inner walls of the positioning grooves are fixedly connected with positioning protrusions.

[0011] By adopting the above technical scheme, the connection strength between the external end ring and the iron sheet can be improved through the arrangement of the positioning protrusions.

[0012] As a preferred implementation, the two sides of the inner wall of the guide strip groove are provided with grooves matched with the positioning protrusions, and the axial height of the iron sheet is between -mm.

[0013] By adopting the above technical scheme, the iron sheet can be better used through the arrangement of the grooves.

[0014] As a preferred implementation, the center of the iron sheet is provided with a mounting hole.

[0015] By adopting the above technical scheme, the iron sheet can be mounted on the external rotating shaft through the arrangement of the mounting hole.

[0016] As a preferred implementation, the outer periphery of the iron sheet is provided with a wear-resistant coating, which is made of acrylic resin material.

[0017] By adopting the above technical scheme, the wear-resistant coating made of acrylic resin material can improve the anti-wear ability of the iron sheet and reduce the surface friction coefficient.

[0018] Compared with the prior art, the advantages and positive effects of the utility model are that,

[0019] 1. In the utility model, through the arrangement of the water drop-shaped heat dissipation holes, the heat flow in the cast aluminum rotor body can flow axially along the cast aluminum rotor body during high-speed rotation, thereby accelerating the air flow in the iron sheet, and through the arrangement of the cooling fins, circumferential wind can be generated around the iron sheet to accelerate heat dissipation of the iron sheet, further improve the heat dissipation performance, and the cooperation of the positioning grooves, the heat dissipation holes and the guide strip grooves can hollow out parts of the iron sheet to reduce the overall weight of the cast aluminum rotor body, and can ensure the structural integrity of the iron sheet, thereby improving the starting torque of the cast aluminum rotor body.

[0020] 2. The utility model discloses an iron sheet outer wear -resisting coating of acrylic resin material can improve the ability and reduce the surface friction coefficient of wear -resisting of iron sheet, and can improve the service life of cast aluminum rotor body further. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The utility model provides a kind of overall perspective of cast aluminum rotor for motor;

[0022] Figure 2 The utility model provides an iron sheet schematic view of cast aluminum rotor for motor;

[0023] Figure 3 The utility model provides a kind of cast aluminum rotor for motor; Figure 2 The enlarged view of A in the middle.

[0024] Legend: 1, cast aluminum rotor body;2, iron sheet;3, heat dissipation hole;4, mounting hole;5, bar groove;6, positioning groove;7, cooling fin;8, positioning protrusion;9, recess. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0026] Reference Figures 1-3 A cast aluminum rotor for motor includes a cast aluminum rotor body 1, which is coaxially stacked and pressed by a plurality of iron sheets 2. The plurality of iron sheets 2 have a circular structure, and a plurality of heat dissipation holes 3 with a water-drop-shaped cross section are formed in the interior of the iron sheet 2. The plurality of heat dissipation holes 3 are evenly distributed along the circumferential direction with the center of the iron sheet 2 as the axis. A plurality of cooling fins 7 are welded to the outer side of the iron sheet 2 and are evenly distributed along the circumferential direction. The water-drop-shaped heat dissipation holes 3 can make the heat flow in the cast aluminum rotor body 1 flow axially during high-speed rotation, thereby accelerating the air flow in the iron sheet 2. The cooling fins 7 can generate circumferential wind power around the iron sheet 2 to accelerate heat dissipation of the iron sheet 2 and further improve the heat dissipation performance. The cooperation of the positioning groove 6, the heat dissipation hole 3 and the bar groove 5 can hollow out parts in the iron sheet 2 to reduce the overall weight of the cast aluminum rotor body 1 and ensure the structural integrity of the iron sheet 2, thereby improving the starting torque of the cast aluminum rotor body 1.

[0027] Specific, the inside of the iron sheet 2 is provided with four positioning grooves 6, two positioning grooves 6 are taken as the center of the iron sheet 2, through the setting of the positioning groove 6, the overall weight of the iron sheet 2 can be reduced, and the iron sheet 2 is symmetrically arranged, the inside of the iron sheet 2 is provided with a plurality of guide bar grooves 5, the guide bar grooves 5 are arranged between the two positioning grooves 6, the inner wall of the positioning groove 6 is fixedly connected with the positioning protrusion 8, through the setting of the positioning protrusion 8, the connecting strength between the external end ring and the iron sheet 2 can be improved, and the stability of the cast aluminum rotor body 1 during operation is improved.

[0028] Specific, the two sides of the inner wall of the guide bar groove 5 are provided with grooves 9 matched with the positioning protrusion 8, through the setting of the groove 9, the iron sheet 2 is used better, the axial height of the iron sheet 2 is 9-16mm, the center of the iron sheet 2 is provided with a mounting hole 4, the mounting hole 4 can be used for mounting on the external rotating shaft, the outer periphery of the iron sheet 2 is provided with a wear-resistant coating, the wear-resistant coating is made of acrylic resin material, through the use of the wear-resistant coating made of acrylic resin material, the anti-wear ability of the iron sheet 2 and the surface friction coefficient can be improved, and the service life of the cast aluminum rotor body 1 can be improved.

[0029] Working principle: first, through the setting of the water drop-shaped heat dissipation hole 3, the heat flow in the cast aluminum rotor body 1 can flow along the cast aluminum rotor body 1 in the axial direction during high-speed rotation, and then the air flow in the iron sheet 2 can be accelerated, and through the setting of the cooling fin 7, the circumferential wind power can be generated on the outer periphery of the iron sheet 2, so that the heat dissipation purpose of the iron sheet 2 is achieved, and through the cooperation of the positioning groove 6, the heat dissipation hole 3 and the guide bar groove 5, the parts in the iron sheet 2 can be hollowed out, so that the overall weight of the cast aluminum rotor body 1 is reduced, and the structural integrity of the iron sheet 2 is ensured, under the same motor use condition, the iron sheet 2 is lighter, so that the speed ratio can be improved, and then the starting torque of the cast aluminum rotor body 1 can be improved, and through the use of the wear-resistant coating made of acrylic resin material, the anti-wear ability of the iron sheet 2 and the surface friction coefficient can be improved, and the service life of the cast aluminum rotor body 1 can be improved.

[0030] In the description of the present application, it should be pointed out that, unless otherwise specified and limited, the terms "installation", "provided with", "connected" and the like should be understood in a broad sense, for example, "connected", which can be fixedly connected, or detachably connected, or integrally connected, which can be mechanically connected, or electrically connected, which can be directly connected, or indirectly connected through an intermediate medium, which can be the communication between two elements, for those skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific situation.

[0031] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application is described in detail with reference to the foregoing embodiments, modifications to the foregoing embodiments or equivalent replacements to some technical features thereof can be made by those skilled in the art, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A cast aluminium rotor for an electrical machine comprising a cast aluminium rotor body (1), characterised in that: The cast aluminum rotor body (1) is pressed by coaxially stacking a plurality of iron sheets (2), the iron sheet (2) is in a circular structure, a plurality of heat dissipation holes (3) with a water drop-shaped cross section are arranged in the iron sheet (2), the heat dissipation holes (3) are arranged along the circumferential direction and are uniformly distributed with the iron sheet (2) center as the axis, and a plurality of heat dissipation fins (7) are welded to the outer side of the iron sheet (2).

2. A cast aluminum rotor for an electric machine as defined in claim 1, characterized in that: The iron sheet (2) is internally provided with four positioning grooves (6), and two positioning grooves (6) are symmetrically arranged with the iron sheet (2) center as the axis.

3. The cast aluminum rotor for an electric machine of claim 1 wherein: A plurality of guide bar grooves (5) are arranged in the iron sheet (2), the guide bar grooves (5) are arranged between the two positioning grooves (6), and the inner walls of the positioning grooves (6) are fixedly connected with positioning protrusions (8).

4. A cast aluminium rotor for an electrical machine according to claim 3, characterised in that: The inner walls of the guide bar grooves (5) are provided with grooves (9) on both sides for cooperation with the positioning protrusions (8), and the axial height of the iron sheet (2) is between 9-16 mm.

5. The cast aluminum rotor for an electric machine of claim 1 wherein: The iron sheet (2) is provided with mounting holes (4) at the center.

6. A cast aluminum rotor for an electric machine as defined in claim 1, wherein: The outer periphery of the iron sheet (2) is provided with a wear-resistant coating, and the wear-resistant coating is made of acrylic resin.

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