CN217522678U

CN217522678U - 3000kW semi-direct-drive vertical mill permanent magnet motor

Info

Publication number: CN217522678U
Application number: CN202220597875.4U
Authority: CN
Inventors: 张兆宇; 王永胜; 柴小东; 刘潇; 李景天
Original assignee: Dalian Zhi Ding Technology Co ltd
Current assignee: Dalian Zhi Ding Technology Co ltd
Priority date: 2022-03-18
Filing date: 2022-03-18
Publication date: 2022-09-30
Anticipated expiration: 2032-03-18

Abstract

The utility model discloses a 3000kW semi-direct-drive vertical mill permanent magnet motor, including reduction gear and PMSM, the reduction gear is placed perpendicularly on PMSM, PMSM includes motor spindle, upper end cover, motor barrel, lower end cover, the upper end cover is installed on motor spindle through the upper bearing, the lower end cover is installed on motor spindle through the lower bearing, be connected with motor barrel between upper end cover and lower end cover, be equipped with annular water course in the wall body of motor barrel; and an eccentric hole a and an eccentric hole b are longitudinally arranged on the motor main shaft, the eccentric hole a is used for injecting high-pressure oil, and the eccentric hole b is used for discharging lubricating oil of the upper bearing. The method and the device have the advantages that intermediate links such as a mechanical soft start device and the like are omitted, the overall efficiency is improved, partial electric energy is saved, the occupied area is small, and the failure rate is low; and the permanent magnet synchronous motor is in a high-torque low-speed running mode, so that vibration caused by unbalanced high-speed rotation is avoided, and the noise is further reduced.

Description

3000kW semi-direct-drive vertical mill permanent magnet motor

Technical Field

The utility model relates to a permanent-magnet machine technical field, concretely relates to 3000kW partly directly drives and immediately grinds permanent-magnet machine.

Background

In the aspect of slag treatment, the vertical mill technology is widely adopted by domestic and foreign industrial manufacturers; the first domestic slag micro powder production line is put into operation around 2000 years, and the driving device is seriously aged in nearly 20 years till now. The existing slag micro powder production line mainly uses an asynchronous motor as a power source, an output shaft of the slag micro powder production line is connected with a reduction gearbox coupler through a coupler, and finally drives a vertical mill to operate.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a high-power high-pressure permanent-magnet machine suitable for slay miropowder trade, this kind of motor volume matches with former drive arrangement reduction gear, and area is little, simple structure, fault rate are low, the installation is maintained conveniently.

In order to achieve the purpose, the 3000kW semi-direct-drive vertical mill permanent magnet motor comprises a speed reducer and a permanent magnet synchronous motor, wherein the speed reducer is vertically placed on the permanent magnet synchronous motor, the permanent magnet synchronous motor comprises a motor main shaft, an upper end cover, a motor cylinder and a lower end cover, the upper end cover is installed on the motor main shaft through an upper bearing, the lower end cover is installed on the motor main shaft through a lower bearing, the motor cylinder is connected between the upper end cover and the lower end cover, and an annular water channel is arranged in a wall body of the motor cylinder; and an eccentric hole a and an eccentric hole b are longitudinally arranged on the motor main shaft, the eccentric hole a is used for injecting high-pressure oil, and the eccentric hole b is used for discharging lubricating oil of the upper bearing.

Furthermore, an upper bearing inner cover and an upper bearing outer cover are respectively arranged on two sides of the upper bearing, an upper bearing lubricating cavity is formed among the upper bearing inner cover, the upper end cover and the upper bearing outer cover, an oil filling channel is formed in the upper end cover and is connected with an upper bearing lubricating inlet through an oil filling hose, the upper bearing lubricating inlet is formed in the side wall of the upper end cover, and an upper bearing lubricating outlet is located on the upper bearing inner cover.

Furthermore, the upper bearing lubricating outlet is connected with the top of the eccentric hole b, and the bottom of the eccentric hole b is provided with a blocking cap.

Furthermore, lower bearing inner cup, lower bearing enclosing cover are equipped with respectively to lower bearing both sides, form the lubricated cavity of lower bearing between lower bearing inner cup, lower end cover, the lower bearing enclosing cover, it has upper bearing oil discharge passageway and the lubricated import of lower bearing to open on the bearing inner cup down, the lubricated import of lower bearing links to each other with the oiling mouth of motor barrel through oiling hose, upper bearing oil discharge passageway links to each other with the lubricated export of upper bearing of motor barrel through oil discharge hose.

Furthermore, a labyrinth seal is arranged on the outer cover of the upper bearing and is fixed on the motor spindle through a locking sleeve.

Furthermore, the position where the motor spindle and the upper bearing are assembled is subjected to insulating spraying treatment.

Furthermore, an oil guide groove is arranged in the upper end cover, and an oil discharge groove connected with the lower bearing lubricating cavity is arranged in the lower end cover.

Furthermore, the motor cylinder is in interference connection with the stator, and the stator is manufactured by adopting a VPI vacuum pressure dip coating and epoxy resin vacuum encapsulation technology.

As a further step, the motor spindle is connected to a rotor via a support, the rotor being provided with permanent magnets of rare earth material.

As a further step, the top and bottom of the lower bearing inner cover are respectively provided with a skeleton oil seal for sealing the lubricating oil discharged from the eccentric hole b.

The utility model discloses an above technical scheme, compare with prior art, the advantage that has is: the method saves intermediate links such as a mechanical soft start device and the like, improves the overall efficiency, saves partial electric energy, and has small occupied area and low failure rate; and the permanent magnet synchronous motor is in a high-torque low-speed running mode, so that vibration caused by unbalanced high-speed rotation is avoided, and the noise is further reduced. Still utilize motor spindle eccentric orfice cooperation upper and lower bearing inner cup as upper bearing oil extraction oil circuit ingeniously, provide the design for the bearing lubrication of same type motor.

Drawings

Fig. 1 is a sectional view of a permanent magnet synchronous motor;

fig. 2 is an assembly view of the reducer and the permanent magnet synchronous motor.

Wherein: 1. the motor comprises a motor main shaft, 2, labyrinth seals, 3, an upper bearing, 4, an upper bearing inner cover, 5, an upper end cover, 6, a motor cylinder, 7, a stator, 8, a rotor, 9, a lower bearing inner cover, 10, a lower bearing, 11, a lower end cover, 12, an oil guide groove, 13, eccentric holes a and 14, eccentric holes b and 15, an upper bearing lubricating outlet, 16, a speed reducer, 17 and a permanent magnet synchronous motor.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the application, i.e., the embodiments described are only a subset of, and not all embodiments of the application. The components of the embodiments of the present application, as generally described and illustrated in the figures herein, could be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.

Example 1

As shown in fig. 1-2, the present embodiment provides a 3000kW half direct-drive vertical mill permanent magnet motor, which includes a speed reducer and a permanent magnet synchronous motor, where the speed reducer is vertically placed on an upper end cover of the permanent magnet synchronous motor, and is connected with a pin hole through a bolt, and the speed reducer may adopt a primary planetary structure; the permanent magnet synchronous motor comprises a motor main shaft, an upper end cover, a motor barrel and a lower end cover, wherein the upper end cover is arranged on the motor main shaft through an upper bearing, the upper bearing is a self-aligning roller bearing and mainly bears a certain radial force, the lower end cover is arranged on the motor main shaft through a lower bearing, the lower bearing is a self-aligning roller bearing and is a main receiver of the weight of a rotor, the motor barrel is connected between the upper end cover and the lower end cover, the motor barrel is a main receiver of dynamic and static loads of vertical mill and is responsible for cooling the motor, and therefore under the condition of meeting the stress, an annular water channel is designed in the barrel, and the over-high temperature rise of the motor is avoided; an eccentric hole a and an eccentric hole b are longitudinally arranged on the motor main shaft, and the eccentric hole a is used for injecting high-pressure oil, so that the upper bearing is convenient to disassemble; the eccentric hole b is used for discharging lubricating oil of the upper bearing.

An upper bearing inner cover and an upper bearing outer cover are respectively arranged on two sides of the upper bearing, an upper bearing lubricating cavity is formed among the upper bearing inner cover, the upper end cover and the upper bearing outer cover, an oil injection channel is formed in the upper end cover and is connected with an upper bearing lubricating inlet through an oil injection hose, the upper bearing lubricating inlet is formed in the side wall of the upper end cover, and an upper bearing lubricating outlet is positioned on the upper bearing inner cover; the upper bearing lubrication outlet is connected with the top of the eccentric hole b, and the bottom of the eccentric hole b is provided with a blocking cap. The bearing lubricating device is characterized in that a lower bearing inner cover and a lower bearing outer cover are respectively arranged on two sides of the lower bearing, a lower bearing lubricating cavity is formed among the lower bearing inner cover, the lower end cover and the lower bearing outer cover, an upper bearing oil discharging channel and a lower bearing lubricating inlet are formed in the lower bearing inner cover, the lower bearing lubricating inlet is connected with an oil filling port of the motor cylinder through an oil filling hose, and the upper bearing oil discharging channel is connected with an upper bearing lubricating outlet of the motor cylinder through an oil discharging hose.

The labyrinth seal is arranged on the outer cover of the upper bearing and is fixed on the main shaft of the motor through the locking sleeve and is mainly used for preventing lubricating oil from leaking to the motor under the oil leakage working condition of the speed reducer, and the leaked oil can be discharged through the oil guide groove of the upper end cover.

And the position where the motor spindle is assembled with the upper bearing is subjected to insulation spraying treatment, so that induced current generated in the running process of the motor is blocked, and electric sparks generated by the bearing are avoided.

The motor cylinder is in interference connection with the stator, the stator is manufactured by adopting a VPI vacuum pressure dip coating and epoxy resin vacuum encapsulation technology, and the insulation reliability of the motor in a high-humidity environment is ensured.

This application changes the latter half of former vertical speed reducer into motor structure, designs and optimizes the electromagnetism scheme of motor in the effective space, accomplishes that the torque is 8.5 times of former motor, but the volume can only be 85% of former motor. The motor can output ultra-large torque by using high-quality magnetic conductive materials, and has ultrahigh power density. The rotor of the permanent magnet synchronous motor has no induced current excitation, and the power factor of the motor is high, so that a compensator is not required to be installed in a power grid.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims

1. A3000 kW semi-direct-drive vertical mill permanent magnet motor is characterized by comprising a speed reducer and a permanent magnet synchronous motor, wherein the speed reducer is vertically placed on the permanent magnet synchronous motor, the permanent magnet synchronous motor comprises a motor main shaft, an upper end cover, a motor cylinder and a lower end cover, the upper end cover is mounted on the motor main shaft through an upper bearing, the lower end cover is mounted on the motor main shaft through a lower bearing, the motor cylinder is connected between the upper end cover and the lower end cover, and an annular water channel is arranged in a wall body of the motor cylinder; and an eccentric hole a and an eccentric hole b are longitudinally arranged on the motor main shaft, the eccentric hole a is used for injecting high-pressure oil, and the eccentric hole b is used for discharging lubricating oil of the upper bearing.

2. The 3000kW semi-direct-drive vertical mill permanent magnet motor is characterized in that an upper bearing inner cover and an upper bearing outer cover are respectively arranged on two sides of an upper bearing, an upper bearing lubricating cavity is formed among the upper bearing inner cover, the upper end cover and the upper bearing outer cover, an oil filling channel is formed in the upper end cover and is connected with an upper bearing lubricating inlet through an oil filling hose, the upper bearing lubricating inlet is formed in the side wall of the upper end cover, and an upper bearing lubricating outlet is formed in the upper bearing inner cover.

3. The 3000kW half direct-drive vertical mill permanent magnet motor as recited in claim 2, wherein the upper bearing lubrication outlet is connected with the top of the eccentric hole b, and the bottom of the eccentric hole b is provided with a blocking cap.

4. The 3000kW semi-direct-drive vertical mill permanent magnet motor is characterized in that a lower bearing inner cover and a lower bearing outer cover are respectively arranged at two sides of a lower bearing, a lower bearing lubrication cavity is formed among the lower bearing inner cover, the lower end cover and the lower bearing outer cover, an upper bearing oil discharge channel and a lower bearing lubrication inlet are formed in the lower bearing inner cover, the lower bearing lubrication inlet is connected with an oil injection port of a motor cylinder through an oil injection hose, and the upper bearing oil discharge channel is connected with an upper bearing lubrication outlet of the motor cylinder through an oil discharge hose.

5. The 3000kW semi-direct-drive vertical mill permanent magnet motor is characterized in that a labyrinth seal is arranged on the upper bearing outer cover and is fixed on a motor spindle through a locking sleeve.

6. The 3000kW semi-direct-drive vertical mill permanent magnet motor is characterized in that insulation spraying treatment is performed at the position where a motor spindle and an upper bearing are assembled.

7. The 3000kW half direct-drive vertical mill permanent magnet motor is characterized in that an oil guide groove is formed in the upper end cover, and an oil discharge groove connected with a lower bearing lubricating cavity is formed in the lower end cover.

8. The 3000kW semi-direct-drive vertical mill permanent magnet motor as recited in claim 1, wherein the motor cylinder is in interference connection with a stator, and the stator is manufactured by a VPI vacuum pressure dip coating and epoxy resin vacuum potting technology.

9. The 3000kW semi-direct-drive vertical mill permanent magnet motor is characterized in that a main shaft of the motor is connected with a rotor through a bracket, and a permanent magnet made of a rare earth material is arranged on the rotor.

10. The 3000kW semi-direct-drive vertical mill permanent magnet motor as recited in claim 4, wherein skeleton oil seals are respectively provided at the top and bottom of the lower bearing inner cover for sealing lubricating oil discharged from the eccentric hole b.