CN213125665U - Improved stator punching sheet, stator core composed of same and motor with multiple air paths - Google Patents

Abstract

The utility model provides an improved stator punching sheet and stator core who constitutes, have many wind path motors, include stator punching sheet body and equipartition in the coil groove of punching sheet body inner circle, the notch of coil groove is raised when one-third to quarter department of coil groove length and is formed the cavity between the interior disc of stator punching sheet. When a plurality of improved stator punching sheets are laminated and mounted to form a stator core, the cavities are connected into a channel to serve as an axial ventilation channel III of the stator; the outer periphery clearance of stator core sets up the shell, and the both ends rigid coupling stator clamping ring simultaneously of shell and stator core, and the outer fringe department of stator clamping ring sets up a plurality of ventilation holes, makes the clearance between stator core and the shell link up with the ventilation hole and link up into the passageway and regard as the axial ventiduct IV on stator surface. The utility model discloses increased the inside circulation wind path of motor, strengthened the inside cooling capacity of motor, the iron core is too long when effectively solving design large capacity motor, cost increase, the limited problem of motor capacity. And the process steps are simple, the operation is convenient, and the temperature rise of the motor is effectively reduced due to the multiple layers of the axial ventilation channels.

Description

Improved stator punching sheet, stator core composed of same and motor with multiple air paths

Technical Field

The utility model relates to a motor field of making, more specifically relate to a stator core, many wind path motors have of modified stator punching and constitution thereof.

Background

The temperature rise in the design and manufacturing process of the large and medium-sized high-voltage motor is an important index, and the motor cooling structure is considered at the initial design. The existing ventilation in the motor is basically axial ventilation and radial ventilation, and an iron core is a main cooling part. The punching sheets are laminated into an iron core, and when the stator iron core and the rotor iron core are ventilated in the radial direction, the stator iron core and the rotor iron core are provided with radial ventilation grooves. When axial ventilation is carried out, the rotor core is generally provided with an axial ventilation channel, and the stator core is not provided with the axial ventilation channel. Therefore, the design of the iron core cannot be too long during axial ventilation, and the capacity is limited during motor design.

SUMMERY OF THE UTILITY MODEL

The utility model provides a modified stator is towards piece and the stator core who constitutes thereof, have many wind path motors, the iron core design can not too long when solving current big-and-middle-sized motor axial ventilation, and capacity receives the problem of restriction during the motor design.

The utility model adopts the following technical scheme:

the utility model provides an improved stator punching, includes stator punching body and the equipartition in the coil groove of punching the piece body inner circle, the notch of coil groove is raised to when one-third to one-fourth department of coil groove length and stator punching the interior disc of piece between form the cavity.

When a plurality of improved stator punching sheets are laminated and mounted to form a stator core, the cavities are connected into a channel to serve as an axial ventilation channel III of the stator; the outer periphery of the stator core is provided with a shell, the two ends of the shell and the stator core are fixedly connected with a stator pressing ring at the same time, and the outer edge of the stator pressing ring is provided with a plurality of ventilation holes, so that the gap between the stator core and the shell and the ventilation holes are communicated and connected into a channel to serve as an axial ventilation channel IV on the surface of the stator.

A motor with a plurality of wind paths formed by stator cores is characterized in that the stator cores with axial ventilation channels III and axial ventilation channels IV on the surface are arranged on the outer surface of a rotor, an air gap II between a stator and the rotor exists between the stator and the rotor, and the rotor is arranged on a rotating shaft and then integrally arranged in a machine base; a fan is arranged in the engine base at an air outlet A on the engine base, and a front wind shield is arranged on the front side of an axial air duct IV on the surface of the stator; a rear wind shield is arranged in the engine base at the position of the air inlet B on the engine base; the engine base is sealed by a cover plate at the end part to form a cavity.

The utility model discloses a with the equipartition when raising to a certain height of coil groove of stator towards the notch of the coil groove of piece body inner circle with the cavity that forms between the interior disc of stator towards the piece form axial passage after the stator is folded towards the piece to increased the inside circulation wind path of motor, strengthened the inside cooling capacity of motor, the iron core is too long when effectively solving design large capacity motor, the cost-push, the limited problem of motor capacity. And the process steps are simple, the operation is convenient, and the temperature rise of the motor is effectively reduced due to the multiple layers of the axial ventilation channels.

Drawings

Fig. 1 is a schematic view of a stator punching sheet of the present invention;

FIG. 2 is a three-dimensional view of the stator core of the present invention;

fig. 3 is a sectional view of the motor assembly of the present invention;

fig. 4 is a schematic view of the internal air path of the motor of the present invention;

description of the symbols: 1. the stator comprises a base, 2, a fan, 3, a front wind shield, 4, a stator core, 5, a rotor core, 6, a shell, 7, a rear wind shield, 40, a stator punching sheet, 41, a ventilation hole, 42, a coil groove, 43, a notch, 44, a cavity, 8, a rotor ventilation channel I, 9, an air gap II and 10 between a stator and a rotor, an axial ventilation channel III and 11 of the stator, an axial ventilation channel IV and 12 on the surface of the stator and a stator pressing ring.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

Embodiment 1, referring to fig. 1, an improved stator punching sheet includes a stator punching sheet body and coil slots uniformly distributed in an inner ring of the punching sheet body, and a cavity 44 is formed between a notch 43 of the coil slot 42 and an inner circular surface of the stator punching sheet 40 when the notch is raised to a position of one third to one fourth of the length of the coil slot 42.

When the stator punching sheet is used, after a coil is installed in the coil slot 42, the coil is pressed into the coil slot 42 by the slot wedge to fixedly limit the movement of the coil, and a cavity 44 is formed between the outer surface of the slot wedge and the inner circular surface of the stator punching sheet. Assuming that the number of the stator slots is Z1, after the punching sheets are laminated on the iron core, Z1 axial ventilation channels are formed on the inner wall of the stator iron core.

In embodiment 2, referring to fig. 2, when a plurality of improved stator laminations 40 are stacked and mounted to form a stator core 4, the cavities 44 are connected to form a channel to serve as an axial air duct iii 10 of the stator; the outer periphery clearance of stator core 4 sets up shell 6, and stator clamping ring 12 is welded at the both ends of this shell 6 and stator core 4, and the outer fringe department of stator clamping ring 12 sets up a plurality of ventilation holes 41, makes the clearance between stator core 4 and the shell 6 link up with ventilation holes 41 and becomes the passageway as the axial ventiduct IV 11 on stator surface. The shell 6 is made of thin steel plates and is connected with the stator core in a wrapping welding mode.

Embodiment 3, referring to fig. 3 and 4, a motor having a plurality of air paths and comprising the stator core according to embodiment 2, wherein the stator core having an axial air duct iii 10 and an axial air duct iv 11 on the surface is mounted on the outer surface of a rotor, and a stator-rotor air gap ii 9 is formed between the stator core and the rotor, and the rotor is mounted on a rotating shaft and then integrally mounted in a base 1; a fan 2 is arranged in the engine base at an air outlet A on the engine base 1, and a front wind shield 3 is arranged on the front side of an axial air duct IV 11 on the surface of the stator; a rear wind shield 7 is arranged in the engine base at the position of an air inlet B on the engine base 1; the base 1 is sealed by a cover plate at the end to form a cavity.

In the following, an air-cooled motor is taken as an example for specific explanation, and as can be seen from fig. 4, 4 ventilation ducts are formed after the motor is assembled: a rotor ventilation duct I8 (an axial ventilation duct is formed when rotor punching sheets are laminated into a rotor core through holes, or a cavity formed by ribs in a welded rib shaft structure, a rotating shaft and the inner diameter of the rotor core is an axial ventilation duct); an air gap II 9 between the stator and the rotor; an axial air duct III 10 of the stator; an axial air duct IV 11 on the surface of the stator; the whole wind path is composed of a machine base 1, a fan 2, front and rear wind shields 3 and 7, a stator iron core 4, a rotor iron core 5 and a shell 6. The base and the external cover plate form a cavity, and air is stored in the cavity. Cold air enters from the air inlet B, enters the iron core from different air channels under the action of the fan 2, is discharged from the air outlet A after cooling the iron core, exchanges heat with an external cooling system, and enters from the air inlet B again, and finally a cooling circulation air path of the whole motor is formed. The front wind shield 3 is fixed to change the wind path. The rear wind shield 7 is adjustable and used for changing the wind path and adjusting the air volume of each air duct, so that cold air is mainly taken from the iron core, the surface of the iron core is assisted, the air volume of each air duct is reasonably distributed, heat is taken away, the requirement of meeting the temperature rise of the motor is met, and the cooling effect of the motor is better.

The utility model discloses process step is simple, convenient operation, and multilayer stranded axial ventilation way effectively reduces the motor temperature rise. On the other hand, the utility model discloses have good ventilation cooling circulation, can make the motor volume reduce, the increase of unit volume power capacity, effective reduce cost.

Claims (3)

1. The improved stator punching sheet comprises a stator punching sheet body and coil grooves uniformly distributed in the inner ring of the punching sheet body, and is characterized in that a cavity (44) is formed between a notch (43) of each coil groove (42) and the inner circular surface of the stator punching sheet (40) when the notch is raised to the position of one third to one fourth of the length of the coil groove (42).

2. A stator core comprising the improved stator lamination of claim 1, wherein when a plurality of improved stator laminations (40) are stacked to form the stator core (4), the cavities (44) are connected into a channel to serve as an axial ventilation duct iii (10) of the stator; the periphery clearance of stator core (4) sets up shell (6), and the both ends rigid coupling stator clamping ring (12) simultaneously of this shell (6) and stator core (4), and the outer fringe department of stator clamping ring (12) sets up a plurality of ventilation holes (41), makes clearance between stator core (4) and shell (6) link up with ventilation hole (41) and link up into the passageway and regard as axial ventiduct IV (11) on stator surface.

3. A motor with multiple air paths comprises the stator core as claimed in claim 2, wherein the stator core with an axial air duct III (10) and a surface axial air duct IV (11) is arranged on the outer surface of a rotor, a stator-rotor air gap II (9) is arranged between the stator core and the rotor, and the rotor is arranged on a rotating shaft and then integrally arranged in a machine base (1); a fan (2) is arranged in the engine base at an air outlet (A) on the engine base (1), and a front wind shield (3) is arranged on the front side of an axial air duct IV (11) on the surface of the stator; a rear wind shield (7) is arranged in the engine base at the position of the air inlet (B) on the engine base (1); the machine base (1) is sealed by a cover plate at the end part to form a cavity.

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