CN111884407A

CN111884407A - Variable-frequency drive biochemical special permanent magnet synchronous direct-drive motor and stator sealing glue treatment method

Info

Publication number: CN111884407A
Application number: CN202010666876.5A
Authority: CN
Inventors: 褚鹏; 姚迎霞; 朱桢燚; 陈钰莲; 朱胜兰
Original assignee: Wuxi Org Electric Co ltd
Current assignee: Wuxi Org Electric Co ltd
Priority date: 2020-07-13
Filing date: 2020-07-13
Publication date: 2020-11-03

Abstract

The invention discloses a frequency conversion drive biochemical special permanent magnet synchronous direct drive motor and a stator sealing glue treatment method, which comprises a motor body arranged on the top of a reaction kettle, wherein the motor body comprises a motor shell, a rotor and a bearing assembly, two ends of the rotor are coaxially and rotatably arranged on the motor shell through the bearing assembly, and the bearing assembly comprises a thrust cylindrical roller bearing and a cylindrical roller bearing which are sequentially arranged along the axial direction; the motor shell is of a closed shell structure with a double-layer structure, a water cooling cavity is formed between the inner wall body and the outer wall body of the motor shell, and the motor shell is communicated with the water cooling cavity and is provided with a water inlet and a water outlet. Carry out water-cooling heat dissipation to motor body through the water-cooling chamber, can discharge the operating heat fast, promote motor body's job stabilization nature and security.

Description

Variable-frequency drive biochemical special permanent magnet synchronous direct-drive motor and stator sealing glue treatment method

Technical Field

The invention belongs to the field of motors, and particularly relates to a variable-frequency driving biochemical special permanent magnet synchronous direct-drive motor.

Background

With the continuous development of the national biochemical industry, the demand of a special motor for biochemistry is more and more, as shown in the attached figure 1, the motor is a schematic diagram of biochemistry of a three-phase asynchronous motor and installation of the biochemical motor and a reaction kettle in the prior art; because the rotating speed of the driving motor body is higher, enough torque can not be generated to drive the stirring shaft, the rotating shafts of the driving motor and the reaction kettle need to be decelerated through the belt pulley, more energy loss is brought by more transmission devices, the high-speed three-phase asynchronous motor is large in noise, low in power factor and large in reactive loss, the motor body generates more heat in work, and the motor body is very easy to damage if heat can not be dissipated in time.

Disclosure of Invention

The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides the frequency-conversion driving biochemical special permanent magnet synchronous direct-drive motor which can reduce energy consumption, greatly improve power factors, reduce noise and efficiently dissipate heat of a motor body.

The technical scheme is as follows: in order to achieve the purpose, the technical scheme of the invention is as follows:

a frequency conversion driving biochemical special permanent magnet synchronous direct drive motor comprises a motor body arranged on the top of a reaction kettle, wherein the motor body comprises a motor shell, a rotor and a bearing assembly, two ends of the rotor are coaxially and rotatably arranged on the motor shell through the bearing assembly, and the bearing assembly comprises a thrust cylindrical roller bearing and a cylindrical roller bearing which are sequentially arranged along the axial direction; the motor shell is of a closed shell structure with a double-layer structure, a water cooling cavity is formed between the inner wall body and the outer wall body of the motor shell, and the motor shell is communicated with the water cooling cavity and is provided with a water inlet and a water outlet.

Further, the motor body further comprises a stator, and epoxy resin glue is coated outside the stator.

Further, a vibration detection element or a temperature detection element is arranged on the bearing assembly facing to one side of the reaction kettle.

Furthermore, the motor shell comprises an inner shell, an outer shell and a partition plate, a closed water cooling cavity is formed between the inner shell and the outer shell, the partition plate is arranged between the water cooling cavities in parallel to the axial direction, and the water inlet and the water outlet are respectively formed in two sides of the partition plate; a plurality of guide plates are arranged in the water cooling cavity in parallel to the axial circumferential array and are arranged in an S-shaped staggered mode to form a cooling flow channel.

Further, still include rotor water cooling assembly, the rotor contains the pivot, the top of pivot is followed the axial and is concavely equipped with the installation cavity of blind hole form, be provided with water-cooling inner core subassembly in the installation cavity.

Further, water-cooling inner core subassembly includes the water-cooled tube and wears to establish the setting and is in support inner core in the water-cooled tube, it is the rod body structure of star type form cross-section to support the inner core, it constitutes out the rivers way to support between inner core and the water-cooled tube, support the inner core interval and set up in the diapire of installation cavity, it has seted up the inhalant canal to support the inner core and link up along the axial.

Furthermore, a sealing seat is sleeved on the outer ring of one side, close to the water inlet end, of the water-cooling pipe, the sealing seat is of an annular structure with a U-shaped cross section, the opening side of the sealing seat is in rotary sealing arrangement with the water-cooling pipe, the wall body of the water-cooling pipe is communicated with the inner cavity of the sealing seat, and a plurality of water-cooling outlets are formed in the inner cavity of the sealing seat and communicated with the water outlet flow channel.

Furthermore, the whole stator is sealed by epoxy resin, and the sealing treatment mode is as follows: plugging a water inlet and a water outlet of a base in the stator by using a plug, pressurizing the base, keeping the pressure at 1MPa for 5 minutes, and ensuring that a water channel of the base has no water leakage; block up the frame outlet, the stator hole preparation drum frock, the frock excircle is more unilateral less than the stator hole 0.3 ~ 0.4mm, axial direction, more than coil end portion 15 ~ 20mm, fill up plastic film between frock and stator hole, do not pour into the good epoxy of allotment with two tip of stator, wait for the epoxy solidification, after the drawing of patterns, to the interior circle of stator and tip car processing, the processing is disposed of unnecessary epoxy of solidification.

Has the advantages that: the stirring shaft of the reaction kettle is directly driven to rotate by the motor body, energy loss is reduced, the motor body is subjected to water cooling through the water cooling cavity, working heat can be rapidly discharged, and the working stability and safety of the motor body are improved.

Drawings

FIG. 1 is a schematic diagram of a prior art biochemical motor;

FIG. 2 is a schematic diagram of the overall structure of the present invention;

FIG. 3 is a schematic half-sectional view of a motor body of the present invention;

FIG. 4 is a schematic view of a motor body of the present invention in a half-sectional view from the A-A direction;

fig. 5 is an enlarged view of the structure of the portion B of the present invention.

Detailed Description

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

As shown in the attached drawings 2 and 3, the frequency conversion driving biochemical special permanent magnet synchronous direct drive motor and the stator sealing adhesive treatment method comprise a motor body arranged on the top of a reaction kettle through a motor mounting support 1, the motor body is arranged on the motor mounting support 1 through a flange 3, the motor body comprises a motor shell 15, a rotor 8 and a bearing assembly 5, two ends of the rotor 8 are coaxially and rotatably arranged on an end cover 10 of the motor shell 15 through the bearing assembly 5, one end of the rotor 8 corresponding to the reaction kettle is connected with a stirring shaft 11 through a coupler 2, and the bearing assembly 5 comprises a thrust cylindrical roller bearing and a cylindrical roller bearing which are sequentially arranged along the axial direction; the shaft extension end bearing adopts a double-bearing structure of a thrust cylindrical roller bearing and a cylindrical roller bearing, wherein the thrust cylindrical roller bearing bears the axial thrust of the stirring rod, and the cylindrical roller bearing bears the radial unbalanced force of the stirring rod during stirring, so that the shaft extension of the motor can bear the thrust in all directions. The motor shell 15 is a closed shell structure with a double-layer structure, a water-cooling cavity 12 is formed between an inner wall body and an outer wall body of the motor shell 15, the water-cooling cavity 12 corresponds to the stator 7, and a water inlet 13 and a water outlet 14 are formed in the motor shell 15 and communicated with the water-cooling cavity 12. The motor body is rapidly conducted and radiated through the flowing water-cooling medium in the water-cooling cavity 12, working heat can be rapidly discharged, and the working stability and safety of the motor body are improved.

The motor body further comprises a stator 7, and epoxy resin glue is coated outside the stator 7. The coil adopts the anticorona round copper wire, the whole stator is sealed by epoxy resin, the coil and the stator core are combined into a whole, the insulating capability is greatly enhanced, and the biochemical fermentation high-humidity environment can be borne. The sealing glue treatment method comprises the following steps: plugging a water inlet and a water outlet of a base in the stator by using a plug, pressurizing the base, keeping the pressure at 1MPa for 5 minutes, and ensuring that a water channel of the base has no water leakage; plugging a base wire outlet, manufacturing a cylindrical tool for a stator inner hole, wherein the excircle of the tool is 0.3-0.4 mm smaller than the single side of the stator inner hole, the excircle of the tool is 15-20 mm higher than the end part of a coil in the axial direction, a plastic film is filled between the tool and the stator inner hole, and the two end parts of the stator are respectively poured into prepared epoxy resin to wait for the epoxy resin to be cured. And after demolding, turning the inner circle and the end part of the stator, and processing and removing redundant cured epoxy resin.

And a vibration detection element or a temperature detection element 4 is arranged on the bearing assembly 5 facing one side of the reaction kettle, the temperature detection element 4 is an HN510 wireless vibration and temperature measurement integrated sensor and is arranged on an outer ring of the cylindrical roller bearing, so that whether the stirring impeller falls off or not can be detected, and the bearing temperature alarm function is realized.

As shown in fig. 3 and fig. 4, the motor housing 15 includes an inner housing 17, an outer housing 18, and a partition plate 19, a closed water cooling cavity 12 is formed between the inner housing and the outer housing, the partition plate 19 is disposed between the water cooling cavities 12 in parallel to the axial direction, the water cooling cavities 12 are separated at one side by the partition plate 19 to form a one-side flow passage, and the water inlet 13 and the water outlet 14 are respectively opened at two sides of the partition plate 19; a plurality of guide plates 20 are arranged in the water cooling cavity 12 in parallel to the axial circumferential array, and the guide plates 20 are arranged in an S-shaped staggered manner to form an S-shaped cooling flow channel.

As shown in fig. 3 to 5, the rotor cooling device further comprises a rotor cooling assembly, the rotor 8 comprises a rotating shaft 16, a blind hole-shaped installation cavity 21 is axially and concavely arranged at the top end of the rotating shaft 16, and a water-cooling inner core assembly is arranged in the installation cavity 21. The inner cavity of the motor body and the rotating shaft 16 are cooled by the water-cooled inner core assembly, so that the heat dissipation efficiency is improved. The water-cooling inner core subassembly includes that water-cooled tube 22 wears to establish the setting with the laminating and is in support inner core 23 in the water-cooled tube 22, support inner core 23 is the rod body structure of star type form cross-section, and support inner core 23 through star type form carries out inside support to water-cooled tube 22, increases water-cooled tube 22's intensity, support and constitute out water runner 27 between inner core 23 and the water-cooled tube 22, support the diapire setting of inner core 23 interval in installation cavity 21, support inner core 23 and link up along the axial and seted up intake runner 24, go out water runner 27 and intake runner 24 intercommunication.

The water-cooled tube 22 is close to one side outer lane cover of intaking end and is equipped with seal receptacle 25, seal receptacle 25 is the annular structure of U type cross-section, the opening side of seal receptacle rotates sealed the setting through the sealing washer with water-cooled tube 22, seal receptacle 25 is for the fixed setting of pivot 16, water-cooling inner core subassembly and motor body relatively fixed set up, communicate on the wall body of water-cooled tube 22 a plurality of water-cooling export 26 have been seted up to seal receptacle 25's inner chamber, just water-cooling export 26 communicates in water flow channel 27, and the cold night liquid after the heat conduction is discharged from water-cooling export 26.

The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.

Claims

1. The utility model provides a biochemical special permanent magnetism of frequency conversion drive directly drives motor which characterized in that: the device comprises a motor body arranged on the top of a reaction kettle, wherein the motor body comprises a motor shell (15), a rotor (8) and a bearing assembly (5), two ends of the rotor (8) are coaxially and rotatably arranged on the motor shell (15) through the bearing assembly (5), and the bearing assembly (5) comprises a cylindrical roller thrust bearing and a cylindrical roller bearing which are sequentially arranged along the axial direction; the motor shell (15) is of a closed shell structure with a double-layer structure, a water cooling cavity (12) is formed between an inner wall body and an outer wall body of the motor shell (15), and the motor shell (15) is communicated with the water cooling cavity (12) and is provided with a water inlet (13) and a water outlet (14).

2. The frequency conversion driving biochemical special permanent magnet synchronous direct drive motor according to claim 1, characterized in that: the motor body further comprises a stator (7), and epoxy resin glue is coated outside the stator (7).

3. The frequency conversion driving biochemical special permanent magnet synchronous direct drive motor according to claim 1, characterized in that: and a vibration detection element or a temperature detection element (4) is arranged on the bearing assembly (5) facing to one side of the reaction kettle.

4. The frequency conversion driving biochemical special permanent magnet synchronous direct drive motor according to claim 1, characterized in that: the motor shell (15) comprises an inner shell (17), an outer shell (18) and a partition plate (19), a closed water cooling cavity (12) is formed between the inner shell and the outer shell, the partition plate (19) is arranged between the water cooling cavities (12) in parallel to the axial direction, and the water inlet (13) and the water outlet (14) are respectively arranged on two sides of the partition plate (19); a plurality of guide plates (20) are arranged in the water cooling cavity (12) in parallel to the axial circumferential array, and the guide plates (20) are arranged in an S-shaped staggered mode to form a cooling flow channel.

5. The frequency conversion driving biochemical special permanent magnet synchronous direct drive motor according to claim 1, characterized in that: still include rotor water cooling assembly, rotor (8) contain pivot (16), the top of pivot (16) is followed the axial and is concavely equipped with mounting chamber (21) of blind hole form, be provided with water-cooling inner core subassembly in mounting chamber (21).

6. The frequency conversion driving biochemical special permanent magnet synchronous direct drive motor according to claim 5, characterized in that: the water-cooling inner core subassembly includes water-cooling tube (22) and wears to establish the setting and is in support inner core (23) in water-cooling tube (22), support inner core (23) are the rod body structure of star type form cross-section, support and constitute between inner core (23) and water-cooling tube (22) and go out rivers way (27), support inner core (23) interval and set up in the diapire of installation cavity (21), it has seted up into rivers way (24) to support inner core (23) to link up along the axial.

7. The frequency conversion driving biochemical special permanent magnet synchronous direct drive motor according to claim 5, characterized in that: the water-cooled tube (22) are close to one side outer lane cover of intaking the end and are equipped with seal receptacle (25), seal receptacle (25) are the annular structure of U type cross-section, the opening side and the water-cooled tube (22) of seal receptacle rotate sealed setting, communicate on the wall body of water-cooled tube (22) a plurality of water-cooling export (26) have been seted up to the inner chamber of seal receptacle (25), just water-cooling export (26) communicate in water runner (27).

8. The frequency conversion driving biochemical special permanent magnet synchronous direct drive motor according to claim 1, characterized in that: the whole stator is sealed by epoxy resin, and the sealing treatment mode is as follows: plugging a water inlet and a water outlet of a base in the stator by using a plug, pressurizing the base, keeping the pressure at 1MPa for 5 minutes, and ensuring that a water channel of the base has no water leakage; block up the frame outlet, the stator hole preparation drum frock, the frock excircle is more unilateral less than the stator hole 0.3 ~ 0.4mm, axial direction, more than coil end portion 15 ~ 20mm, fill up plastic film between frock and stator hole, do not pour into the good epoxy of allotment with two tip of stator, wait for the epoxy solidification, after the drawing of patterns, to the interior circle of stator and tip car processing, the processing is disposed of unnecessary epoxy of solidification.