CN211089342U

CN211089342U - High-efficient compact permanent-magnet machine and bearing box connection assembly

Info

Publication number: CN211089342U
Application number: CN201922309371.9U
Authority: CN
Inventors: 朱兰岚; 龚兴龙; 马清云; 安界宁; 李朝阳
Original assignee: Shanghai General Fan Co Ltd
Current assignee: Shanghai General Fan Co Ltd
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2020-07-24
Anticipated expiration: 2029-12-20

Abstract

The utility model discloses a high-efficient compact permanent-magnet machine and bearing box connection assembly, including permanent-magnet machine, flange, main shaft and transmission box, the flange is fixed at permanent-magnet machine's tip, and permanent-magnet machine's one end is connected with the output shaft and stretches out and wear out the flange, and one end of transmission box is fixed with transmission box end cover one, and the side of transmission box end cover one is fixed with the hookup end cover, and the flange is together fixed with the hookup end cover, and the output shaft stretches and the main shaft is through built-in direct connection with the transmission power moment of torsion; the flange and the connecting end cover are provided with mounting rabbets for centering connection; the flange and the connecting end cover are fixed through bolts. The utility model adopts the embedded inner key direct connection, has compact axial size and can protect the motor; the device can be used under severe working conditions, and is simple to maintain; has 99.5% transmission efficiency; the low load and variable-speed high-efficiency energy conservation of the matched permanent magnet motor is further exerted and ensured; the applicability of the original bearing box under different fan working conditions of high speed and high load is reserved.

Description

High-efficient compact permanent-magnet machine and bearing box connection assembly

Technical Field

The utility model belongs to the permanent-magnet machine field, concretely relates to high-efficient compact permanent-magnet machine and bearing box connection assembly.

Background

The fan is a general machine with large quantity and wide range, generally has a connection mode of direct connection of a motor, direct connection of a coupler and belt transmission, is applied to various fields of various industries, is a rotating machine with large energy consumption, and accounts for 10 percent of the total generated energy; the fan is also a machine with a transmission system which is seriously abraded in daily life, complex in maintenance and huge in volume. Therefore, it is very important to optimize the fan transmission system, reduce the maintenance complexity and make the structure volume as compact as possible.

At present, the fan industry generally adopts three transmission modes:

First, the motor is directly connected with the impeller cantilever, and the impeller cantilever has the advantages that as shown in the figure 1-1: 1. the motor 100 is directly connected, so that the structure is most compact; 2.100% transmission efficiency. The disadvantages are that: 1. the motors are directly connected, and the motors are easy to damage when mechanical faults occur; 2. can not be used under the severe working conditions of corrosion, high temperature and the like.

Second, the pulley drive, impeller cantilever, see fig. 1-2, has the advantages of: 1. the belt wheel 200 is driven, and the fan performance can be adjusted by changing the fan rotating speed; 2. 95% transmission efficiency. The disadvantages are that: 1. the belt wheel 200 is driven, the triangular belt needs to be frequently tensioned, and the maintenance is complex; 2. the triangular belt has limited service life and high use cost.

Thirdly, the shaft coupling is directly connected with the impeller cantilever, and the advantages are as follows, as shown in fig. 1-3: 1. the coupler 300 is directly connected, and the motor can be protected when mechanical failure occurs; 2.99% transmission efficiency. The disadvantages are that: 1. the coupler 300 is directly connected, and the axial size is large; 2. the fan performance cannot be adjusted by changing the fan speed.

The patent with application number 201320224719.4 provides a heavy-duty motor structure, which has the advantages that: the motor direct-connection fan is specially designed for the large-load motor direct-connection fan, so that the specification of the motor direct-connection fan can be improved to about 1400. The disadvantages are as follows: the motors are directly connected, and the motors are easy to damage when mechanical faults occur; the material can not be used under the severe working conditions of corrosion, high temperature and the like; the performance of the fan cannot be adjusted by changing the rotating speed of the fan; the motor with the same specification has huge power volume, so that the bearing specification is large, and the highest use rotating speed of a motor fan is influenced; the process is complex and the price is high.

SUMMERY OF THE UTILITY MODEL

The utility model discloses not enough to prior art exists, a high-efficient compact permanent-magnet machine and bearing box connection assembly is provided to solve various not enough and the defect of present motor direct connection, shaft coupling direct connection, belt drive's connection mode.

The utility model provides an above-mentioned technical problem's technical scheme as follows: a high-efficiency compact permanent magnet motor and bearing box connecting assembly comprises a permanent magnet motor, a flange, a main shaft and a transmission box body, wherein the flange is fixed at the end part of the permanent magnet motor, one end of the permanent magnet motor is connected with an output shaft which extends out of the flange, one end of the transmission box body is fixed with a first transmission box end cover, a connecting end cover is fixed on the side surface of the first transmission box end cover, the flange and the connecting end cover are fixed together, and the output shaft extends out of the main shaft and is directly connected with the main shaft through a built-in connection to transmit power torque; the flange and the connecting end cover are provided with mounting rabbets for centering connection; the flange and the connecting end cover are fixed through bolts.

Through the technical scheme, the permanent magnet motor and the transmission case omit a coupler and a belt pulley in the traditional transmission mode, are directly connected by an internal key, are fixed by a flange mounting spigot and a bolt, and integrate the advantages of the original motor direct connection, belt pulley driving and coupler direct connection transmission.

The utility model discloses further set up to, the main shaft is located in transmission case end cover one, the output shaft stretches into in the transmission case end cover one with the main shaft is connected.

The utility model discloses further set up to, with the main shaft contact be equipped with the seal groove on the face of transmission case end cover one, be equipped with labyrinth seal in the seal groove.

The utility model is further arranged in that a first bearing is arranged in the first transmission case end cover, a second bearing is arranged in the second transmission case end cover, a first locking nut and a second locking nut are fixed on the main shaft, and the first bearing is abutted between the transmission case body, the first transmission case end cover, the first locking nut and the main shaft; a first positioning ring is arranged between the first bearing and the main shaft and is tightly attached to the transmission box body;

The utility model is further arranged in that a second transmission case end cover is fixed at one end of the transmission case body, and the second bearing is abutted between the transmission case body, the second transmission case end cover, the second locking nut and the main shaft; and a second positioning ring is arranged between the second bearing and the main shaft and is tightly attached to the transmission box body.

The utility model discloses further set up to, transmission case end cover one with between the transmission case body and transmission case end cover two with pass through the fix with screw between the transmission case body.

The utility model discloses further set up as, with the transmission case contact be equipped with O type sealing washer in the transmission case end cover one.

To sum up, the utility model discloses following beneficial effect has:

(1) The permanent magnet motor is directly connected with the bearing box by an internal key: the advantages of compact direct connection structure of the motor and nearly 100 percent of transmission efficiency are kept; the axial size is compact, and the motor can be protected when mechanical failure occurs; the defects that the motor is easily damaged and cannot be used under severe working conditions such as corrosion and high temperature due to mechanical failure of direct connection of the motor are overcome, and the maintenance is simple.

(2) The permanent magnet motor is directly connected with the bearing box by an internal key: the advantage that the performance of the fan can be adjusted by changing the rotating speed of the fan through belt wheel driving is kept; the transmission inefficiency of the belt wheel drive of about 95 percent is overcome, the frequent tensioning of the belt wheel drive triangular belt is needed, and the maintenance is complex; the triangular belt has the defects of limited service life and high use cost.

(3) The permanent magnet motor is directly connected with the bearing box by an internal key: the advantages that the motor can be protected and the transmission efficiency is close to 100 percent when the coupler is directly connected and mechanical failure occurs are kept; the pulley drive with 99 percent of transmission efficiency can change the rotating speed of the fan to adjust the performance of the fan; the defects that the shaft coupler is directly connected, the axial size is large, and the performance of the fan cannot be adjusted by changing the rotating speed of the fan are overcome.

(4) The utility model discloses a high-efficient compact permanent-magnet machine and bearing box connection assembly structure, the permanent-magnet machine of adapted carries out the rotational speed regulation from taking the converter to change, and permanent-magnet machine has the incomparable advantage of ordinary motor, inverter motor, band pulley drive variable speed under the condition of low load, variable speed, makes the utility model discloses a high-efficient energy-conservation obtains further performance and assurance.

(5) The utility model discloses a high-efficient compact permanent-magnet machine and bearing box connection assembly structure, the transmission case of adapted has kept former bearing box suitability under high-speed, the different fan operating modes of high load, reaches economy, durable, energy-conserving effect.

Drawings

FIG. 1-1 shows one of the conventional transmission modes (motor direct connection, impeller suspension arm);

Fig. 1-2 show a second prior art transmission (pulley drive, impeller cantilever);

Fig. 1-3 show a third conventional transmission mode (direct coupling, impeller suspension arm);

Fig. 2 is a schematic view of a partial cross-sectional structure of the present invention;

Fig. 3 is a schematic diagram of a partial cross-sectional structure according to the present invention.

Wherein, 1, a permanent magnet motor; 1-1, output shaft extension; 2. a transmission case body; 2-1, a main shaft; 2-2, installing a spigot; 3. an internal bond; 4. an O-shaped sealing ring; 5. a bolt; 6. connecting an end cover; 7. a first transmission case end cover; 8. a second end cover of the transmission case; 9. locking the nut; 10. a first bearing; 11. a second bearing; 12. a first positioning ring; 13. and (4) labyrinth sealing.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As an embodiment of the present invention, referring to fig. 2 and fig. 3, a high-efficiency compact permanent magnet motor and bearing box coupling assembly includes a permanent magnet motor 1, a flange, a main shaft 2-1 and a transmission box body 2, the flange is fixed at the end of the permanent magnet motor 1, one end of the permanent magnet motor 1 is connected with an output shaft extension 1-1 and penetrates out of the flange, one end of the transmission box body 2 is fixed with a transmission box end cover 7, a coupling end cover 6 is fixed at the side of the transmission box end cover 7, an O-shaped sealing ring 4 is installed in the coupling end cover 6 contacting with the transmission box body 2, the flange and the coupling end cover 6 are fixed together, the output shaft extension 1-1 and the main shaft 2-1 are built-in a direct connection to transmit power torque; mounting rabbets 2-2 are arranged on the flange and the connecting end cover 6 for centering connection, and the mounting rabbets 2-2 comprise concave rabbets and convex rabbets which are respectively arranged on the connecting end cover 6 and the flange; the flange and the connecting end cover 6 are fixed through bolts 5.

The main shaft 2-1 is positioned in the connecting end cover 6, and the output shaft 1-1 extends into the connecting end cover 6 to be connected with the main shaft 2-1. The output shaft extension 1-1 is directly connected by a blind hole inner key 3 in an embedding mode to transmit power torque.

The surface of the connecting end cover 6 contacted with the main shaft 2-1 is provided with a sealing groove, and a labyrinth seal 13 is arranged in the sealing groove.

Further, a second transmission case end cover 8 is fixed at one end of the transmission case body 2, a first bearing 10 is installed in the connecting end cover 6, a second bearing 11 is installed in the second transmission case end cover 8, a first locking nut 9 and a second locking nut 9 are fixed on the main shaft 2-1, the first bearing 10 abuts against the transmission case body 2, the connecting end cover 6, the first locking nut 9 and the main shaft 2-1, and the second bearing 11 abuts against the transmission case body 2, the second transmission case end cover 8, the second locking nut 9 and the main shaft 2-1; a first locating ring 12 is arranged between the first bearing 10 and the main shaft 2-1, the first locating ring 12 is tightly attached to the transmission case 2, and a second locating ring is arranged between the second bearing 11 and the main shaft 2-1 and tightly attached to the transmission case 2. The first positioning ring 12 and the second positioning ring play a positioning role. Bearing types and combinations thereof can be flexibly selected according to load/rotating speed: deep groove ball bearings, self-aligning roller bearings, cylindrical roller bearings, angular contact bearings; the brand of domestic/imported (NSK SKF FAG WGB) is selected.

The connection end cover 6 and the transmission case body 2, and the transmission case end cover II 8 and the transmission case body 2 are fixed through screws.

Lubrication can be selected according to the operation temperature and the working conditions: oil lubrication and grease lubrication.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-efficiency compact permanent magnet motor and bearing box connection assembly is characterized by comprising a permanent magnet motor, a flange, a main shaft and a transmission box body, wherein the flange is fixed at the end part of the permanent magnet motor, one end of the permanent magnet motor is connected with an output shaft extension and penetrates out of the flange, one end of the transmission box body is fixed with a first transmission box end cover, a connection end cover is fixed on the side surface of the first transmission box end cover, the flange and the connection end cover are fixed together, and the output shaft extension and the main shaft are directly connected through a built-in direct connection to transmit power torque; the flange and the connecting end cover are provided with mounting rabbets for centering connection; the flange and the connecting end cover are fixed through bolts.

2. The efficient compact permanent magnet motor and bearing housing coupling assembly of claim 1, wherein said main shaft is located within said first transmission housing end cap, and said output shaft extends into said first transmission housing end cap to connect with said main shaft.

3. The assembly of claim 1, wherein a sealing groove is formed on a surface of the end cover of the transmission case, which is in contact with the main shaft, and a labyrinth seal is arranged in the sealing groove.

4. The efficient compact permanent magnet motor and bearing housing coupling assembly of claim 1, wherein a first bearing is installed in the first transmission housing end cover, a second transmission housing end cover is fixed to one end of the transmission housing, a second bearing is installed in the second transmission housing end cover, a first lock nut and a second lock nut are fixed to the main shaft, and the first bearing abuts against the transmission housing, the first transmission housing end cover, the first lock nut and the main shaft; and a first positioning ring is arranged between the first bearing and the main shaft and is tightly attached to the transmission box body.

5. The efficient compact permanent magnet motor and bearing housing coupling assembly of claim 4, wherein said second bearing abuts between said transmission housing, said transmission housing end cap two, said second lock nut, and said spindle; and a second positioning ring is arranged between the second bearing and the main shaft and is tightly attached to the transmission box body.

6. The efficient compact permanent magnet motor and bearing housing coupling assembly of claim 5, wherein the first transmission housing end cover and the transmission housing body, and the second transmission housing end cover and the transmission housing body are fixed by screws.

7. The assembly of claim 1, wherein an O-ring seal is disposed in a first end cap of said transmission housing that contacts said transmission housing.