Inner rotor permanent magnet synchronous motor of industrial fan

Abstract

The utility model relates to a motor for an industrial fan. An inner rotor permanent magnet synchronous motor of an industrial fan comprises an inner rotor and an outer stator, the stator comprises a stator disc and a coil iron core winding installed in the stator disc, the rotor comprises a rotor disc and magnetic steel installed in the rotor disc, the rotor disc and the magnetic steel are in clearance fit, and the magnetic steel rotates on the inner side of the coil iron core winding; the stator disc shell is provided with a flange type mounting hole site, one end of the stator shaft is provided with a flange, and the flange is connected with the stator shell through a flange hole bolt and extends upwards; the coil iron core winding is a circular ring formed by splicing a group of single iron core windings, an inner ring cavity area is a rotor rotation area, and the outer diameter of the circular ring is in interference fit with the corresponding installation inner diameter of the stator shell; the rotor disc shell is an integrally manufactured part, and the group of magnetic steel is attached to the wall of the rotor disc inner sleeve; the upper end face of the rotor disc is provided with fan blade installation fixing hole sites, and the fan blade installation hole sites are evenly distributed according to the actual number of fan blades. The utility model has the advantages of large driving torque and convenience in installation.

Description

Technical Field

[0001] The utility model relates to an industrial fan, in particular to a motor used for the industrial fan. Background Art

[0002] Nowadays, there are few dedicated motors in the field of industrial large fans, and asynchronous motors are often used to drive them. However, asynchronous motors are expensive to manufacture and maintain, and the built-in reducer is not easy to repair and replace. There are also cases of lubricating oil leakage. On the other hand, as a common design for fans, the motor is suspended on the roof of the house, and the motor outputs downward to drive the turntable to rotate the fan blades. However, for industrial fans, due to their large size, installation is difficult; also because of their large size and large torque, the output shaft of the motor with this structure will be subjected to extremely large torque, and there is a risk of being twisted off, causing accidents. Summary of the invention

[0003] The utility model aims to solve the above-mentioned defects of the prior art and provides an inner rotor permanent magnet synchronous motor for an industrial fan.

[0004] The utility model is safe and reliable, has a large driving torque and is easy to install.

[0005] The utility model discloses an inner rotor permanent magnet synchronous motor for an industrial fan, comprising a stator and a rotor, wherein the stator comprises a stator disk and a coil core winding installed therein, and the rotor comprises a rotor disk and a magnetic steel installed therein, the two are clearance-matched, and the magnetic steel rotates inside the coil core winding;

[0006] The stator disc housing is an integral manufacturing part and is equipped with flange-type mounting holes. A mounting flange is provided at one end of the stator shaft, which is bolted to the stator housing through the flange hole and extends upward. The coil core winding is a group of single core windings spliced ​​into a ring, and the inner ring cavity area is the rotor rotation area. The outer diameter of the ring is interference fit with the corresponding mounting inner diameter of the stator housing.

[0007] The rotor disk shell is an integrally manufactured part, with a group of magnets attached to the inner sleeve wall of the rotor disk; the upper end surface of the rotor disk is equipped with evenly distributed blade installation and fixing holes, and the blade installation holes are evenly distributed according to the actual number of blades.

[0008] In the inner rotor permanent magnet synchronous motor of the industrial fan, the inner wall of the shell of the stator disk has a limiting step to limit the pressing depth of the coil core winding.

[0009] The inner rotor permanent magnet synchronous motor of the industrial fan has a sealing ring installation groove on the edge of the rotor disk, and a sealing ring is installed thereon, so that the gap between the rotor disk and the stator disk is less than 1 mm.

[0010] The inner rotor permanent magnet synchronous motor of the industrial fan is described, the inner shaft of the rotor disk is sleeved with a limit stop bar, the limit stop bar is evenly provided with separation grooves, the magnetic steel is coated with glue and inserted into each separation groove on the magnetic steel limit stop bar.

[0011] The inner rotor permanent magnet synchronous motor of an industrial fan is described, wherein a bearing is installed in a bearing seat hole in the rotor disk, an outer ring of the bearing is limited by a bearing retaining ring, a sealing ring is arranged in a sealing groove on the outer circumference of the rotor disk, and an oil seal is arranged in the shaft hole on the reverse side of the rotor disk.

[0012] The inner rotor permanent magnet synchronous motor of the industrial fan has an output rotation torque end of the rotor located at the upper end of the vertically suspended stator.

[0013] The utility model does not use gears for transmission and has no liquid oil lubrication, so there is no oil leakage problem. Since the output shaft is output upward to drive the turntable to drive the fan blades, the entire height can be made relatively small. In the case of suspension shafts of the same material and the same diameter, the data shaft size is short, which can withstand greater torque and ensure safety. The utility model is more convenient to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings:

[0015] Figure 1 This is a cross-sectional view of the utility model;

[0016] Figure 2 is a schematic diagram of the stator;

[0017] Figure 3 is an assembly drawing of the stator;

[0018] Figure 4 is an assembly drawing of the rotor;

[0019] Figure 5 is a schematic diagram of the rotor;

[0020] Figure 6 It is a schematic diagram of the utility model. DETAILED DESCRIPTION

[0021] See also Figure 1-Figure 6 , the motor consists of:

[0022] Stator 1: stator shaft 11, bolt assembly 12, stator plate 13, core bolt assembly 14, see the attached figure for details

[0023] Rotor 2: magnetic steel limit stop bar 21, magnetic steel 22, bearing retaining ring 23, bearing 24, sealing ring 25, rotor disk 26, oil seal 27,

[0024] Specific installation method

[0025] Stator assembly: The stator shaft 11 and the stator disk 13 are connected together by a bolt assembly 12, and the core coil assembly 14 is pressed into the inner circular cavity of the stator disk by a small press to form the stator.

[0026] Rotor assembly: insert the magnetic steel limit stopper 21 into the internal shaft of the rotor disk 26, apply glue to the magnetic steel 22, and insert it into each separation groove on the magnetic steel limit stopper 21, so that the magnetic steel, the magnetic steel limit stopper and the rotor disk are fixed together. Install the bearing into the bearing seat hole in the rotor disk, limit the outer ring of the bearing by the bearing retaining ring 23, press the sealing ring 25 into the sealing groove on the outer circumference of the rotor disk, and install the oil seal in the shaft hole on the reverse side of the rotor disk, and the rotor is formed.

[0027] Put the rotor 2 from top to bottom, insert the inner hole of the bearing into the stator shaft 11, and press down until the inner ring of the bearing is pressed onto the step shoulder on the stator shaft, and the motor assembly is completed.

Claims

1. An inner rotor permanent magnet synchronous motor for an industrial fan, comprising an inner rotor and an outer stator, characterized in that: The stator includes a stator disk and a coil core winding installed therein, and the rotor includes a rotor disk and a magnetic steel installed therein, the two are gap-matched, and the magnetic steel rotates inside the coil core winding; The stator disc housing is an integral manufacturing part and is equipped with flange-type mounting holes. A mounting flange is provided at one end of the stator shaft, which is bolted to the stator housing through the flange hole and extends upward. The coil core winding is a group of single core windings spliced ​​into a ring, and the inner ring cavity area is the rotor rotation area. The outer diameter of the ring is interference fit with the corresponding mounting inner diameter of the stator housing. The rotor disk shell is an integrally manufactured part, with a group of magnets attached to the inner sleeve wall of the rotor disk; the upper end surface of the rotor disk is equipped with evenly distributed blade installation and fixing holes, and the blade installation holes are evenly distributed according to the actual number of blades.

2. The inner rotor permanent magnet synchronous motor of an industrial fan according to claim 1, characterized in that: The inner wall of the shell of the stator disk is provided with a limiting step to limit the pressing depth of the coil core winding.

3. The inner rotor permanent magnet synchronous motor of an industrial fan according to claim 1, characterized in that: The edge of the rotor disk is provided with a sealing ring installation groove, on which a sealing ring is installed, so that the gap between the rotor disk and the stator disk is less than 1 mm.

4. The inner rotor permanent magnet synchronous motor of an industrial fan according to claim 1, characterized in that: A limit stopper strip is sleeved on the inner shaft of the rotor disk, and separation grooves are evenly arranged on the limit stopper strip. The magnetic steel is coated with glue and inserted into each separation groove on the magnetic steel limit stopper strip.

5. The inner rotor permanent magnet synchronous motor of an industrial fan according to claim 1, characterized in that: The bearing seat hole in the rotor disk is equipped with a bearing, and the outer ring of the bearing is limited by a bearing retaining ring. There is a sealing ring in the sealing groove on the outer circumference of the rotor disk, and the oil seal is in the shaft hole on the reverse side of the rotor disk.

6. The inner rotor permanent magnet synchronous motor of an industrial fan according to claim 1, characterized in that The output rotating torque end of the rotor is located at the upper end of the vertically suspended stator.

Images